Table of Contents
- About this manual
- Chapter 1. Safety information
- Chapter 2. Important service information
- Chapter 3. General checkout
- Chapter 4. Related service information
- Chapter 5. Configuring RAID
- Chapter 6. Special keys
- Chapter 7. Locations
- Chapter 8. FRU replacement notices
- Chapter 9. Removing or replacing a FRU
- General guidelines
- Common service tools
- Before servicing the computer
- Removing a major FRU
- 1010 Battery
- 1020 Bottom cover
- 1030 Storage drive
- 1040 Memory module under the bottom cover
- 1050 Coin-cell battery
- 1060 Keyboard
- 1070 Memory module bracket and memory module under the keyboard
- 1080 Wireless LAN card
- 1090 Wireless WAN card
- 1100 Keyboard bezel assembly
- 1110 Color sensor assembly, fingerprint reader cable, and trackpad cable
- 1120 Hinge caps
- 1130 LCD unit
- 1140 Chassis assembly
- 1150 Smart card reader, smart card reader cable, or dummy smart card
- 1160 Speaker assembly and speaker rubber
- 1170 Thermal fan assembly
- 1180 System board
- 1190 Base cover assembly
- Removing an LCD FRU for non-touch models
- Removing an LCD FRU for touch models
- Appendix A. Notices
- Appendix B. Abbreviation table
Lenovo 01AY394 User Manual
Displayed below is the user manual for 01AY394 by Lenovo which is a product in the Notebook Spare Parts category. This manual has pages.
Related Manuals
ThinkPad P50
Hardware Maintenance Manual
Note: Before using this information and the product it supports, be sure to read the general information
under Appendix A “Notices” on page 115.
Fourth Edition (April 2019)
© Copyright Lenovo 2015, 2019.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General Services Administration
“GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925.
Contents
About this manual . . . . . . . . . . . . iii
Chapter 1. Safety information . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 1
Safety inspection guide . . . . . . . . . . . . . 2
Handling devices that are sensitive to electrostatic
discharge . . . . . . . . . . . . . . . . . . 3
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multilingual translations) . . . . . . 4
Chapter 2. Important service
information . . . . . . . . . . . . . . . 21
Strategy for replacing FRUs . . . . . . . . . . 21
Strategy for replacing a hard disk drive or a
solid-state drive . . . . . . . . . . . . . 21
Important notice for replacing a system
board . . . . . . . . . . . . . . . . . 22
How to use error message . . . . . . . . . 22
Strategy for replacing FRUs for CTO, special-bid,
and standard models. . . . . . . . . . . . . 22
Product definition . . . . . . . . . . . . 22
FRU identification . . . . . . . . . . . . 22
Chapter 3. General checkout . . . . . 25
What to do first . . . . . . . . . . . . . . . 25
Checkout guide . . . . . . . . . . . . . . . 26
Lenovo Solution Center . . . . . . . . . . 26
Quick test programs . . . . . . . . . . . 26
UEFI diagnostic program . . . . . . . . . 27
Bootable diagnostic programs . . . . . . . 27
Power system checkout . . . . . . . . . . . 28
Checking the ac power adapter . . . . . . . 28
Checking the operational charging . . . . . 29
Checking the battery pack . . . . . . . . . 29
Checking the coin-cell battery . . . . . . . 29
Chapter 4. Related service
information . . . . . . . . . . . . . . . 31
Restoring the factory contents by using the
Recovery Disc Set . . . . . . . . . . . . . . 31
Recovery overview for the Windows 10 operating
system . . . . . . . . . . . . . . . . . . 32
Resetting your computer . . . . . . . . . 32
Using advanced startup options . . . . . . 32
Recovering your operating system if Windows
10 fails to start . . . . . . . . . . . . . 33
Creating and using a recovery USB drive . . . 33
Passwords. . . . . . . . . . . . . . . . . 34
Power-on password . . . . . . . . . . . 34
Hard disk password . . . . . . . . . . . 34
Supervisor password . . . . . . . . . . . 34
How to remove the power-on password . . . 35
How to remove the hard disk password. . . . 35
Power management . . . . . . . . . . . . . 36
Screen blank mode (for Windows 7 only) . . . 36
Sleep mode . . . . . . . . . . . . . . 36
Hibernation mode . . . . . . . . . . . . 36
Symptom-to-FRU index . . . . . . . . . . . 37
Numeric error codes . . . . . . . . . . . 37
Error messages . . . . . . . . . . . . . 39
Beep symptoms . . . . . . . . . . . . . 39
No-beep symptoms . . . . . . . . . . . 40
LCD-related symptoms . . . . . . . . . . 40
Intermittent problems . . . . . . . . . . . 40
Undetermined problems . . . . . . . . . 41
Chapter 5. Configuring RAID . . . . . 43
Chapter 6. Special keys . . . . . . . . 45
Chapter 7. Locations . . . . . . . . . 47
Locating computer controls, connectors, and
indicators . . . . . . . . . . . . . . . . . 47
Front view . . . . . . . . . . . . . . . 47
Rear view . . . . . . . . . . . . . . . 48
Bottom view . . . . . . . . . . . . . . 48
Status indicators . . . . . . . . . . . . 48
Locating FRUs and CRUs . . . . . . . . . . . 50
Major FRUs . . . . . . . . . . . . . . 52
LCD FRUs . . . . . . . . . . . . . . . 54
Miscellaneous parts . . . . . . . . . . . 56
Connector and cable guide . . . . . . . . 56
Looking up FRU information . . . . . . . . . . 59
Chapter 8. FRU replacement
notices . . . . . . . . . . . . . . . . . 61
Screw notices . . . . . . . . . . . . . . . 61
Retaining serial numbers . . . . . . . . . . . 62
Restoring the serial number of the system
unit . . . . . . . . . . . . . . . . . . 62
Retaining the UUID. . . . . . . . . . . . 63
Reading or writing the ECA information . . . . 63
Chapter 9. Removing or replacing a
FRU. . . . . . . . . . . . . . . . . . . 65
General guidelines. . . . . . . . . . . . . . 65
© Copyright Lenovo 2015, 2019 i
Common service tools . . . . . . . . . . . . 66
Before servicing the computer . . . . . . . . . 66
Removing the micro SIM card . . . . . . . 66
Removing the dummy ExpressCard . . . . . 66
Removing a major FRU . . . . . . . . . . . . 67
1010 Battery . . . . . . . . . . . . . . 67
1020 Bottom cover. . . . . . . . . . . . 68
1030 Storage drive . . . . . . . . . . . . 68
1040 Memory module under the bottom
cover . . . . . . . . . . . . . . . . . 73
1050 Coin-cell battery . . . . . . . . . . 74
1060 Keyboard . . . . . . . . . . . . . 75
1070 Memory module bracket and memory
module under the keyboard . . . . . . . . 79
1080 Wireless LAN card . . . . . . . . . . 80
1090 Wireless WAN card . . . . . . . . . 81
1100 Keyboard bezel assembly . . . . . . . 83
1110 Color sensor assembly, fingerprint
reader cable, and trackpad cable . . . . . . 86
1120 Hinge caps . . . . . . . . . . . . 87
1130 LCD unit . . . . . . . . . . . . . 88
1140 Chassis assembly . . . . . . . . . . 90
1150 Smart card reader, smart card reader
cable, or dummy smart card . . . . . . . . 92
1160 Speaker assembly and speaker
rubber. . . . . . . . . . . . . . . . . 94
1170 Thermal fan assembly . . . . . . . . 95
1180 System board . . . . . . . . . . . 96
1190 Base cover assembly . . . . . . . . 99
Removing an LCD FRU for non-touch models . . . 100
2010 LCD bezel assembly . . . . . . . . . 100
2020 Bezel support rubber. . . . . . . . . 101
2030 LCD panel, hinge assembly, and LCD
cable . . . . . . . . . . . . . . . . . 102
2040 LED camera cable assembly . . . . . . 104
2050 Antenna kit and LCD rear cover
assembly . . . . . . . . . . . . . . . 106
Removing an LCD FRU for touch models . . . . . 107
2010 LCD strip bezel . . . . . . . . . . . 108
2020 LCD panel assembly, hinge assembly,
and LCD cable . . . . . . . . . . . . . 108
2030 LED camera cable assembly . . . . . . 111
2040 Antenna kit and LCD rear cover
assembly . . . . . . . . . . . . . . . 112
Appendix A. Notices . . . . . . . . . . 115
Appendix B. Abbreviation table . . . . 117
ii ThinkPad P50 Hardware Maintenance Manual
About this manual
This manual contains service and reference information for the following ThinkPad® products.
ThinkPad P50 Machine Types (MT) 20EN and 20EQ
Use this manual along with the advanced diagnostic tests to troubleshoot problems.
Important: This manual is intended only for trained service technicians who are familiar with ThinkPad
products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively.
Before servicing a ThinkPad product, be sure to read all the information under Chapter 1 “Safety information”
on page 1 and Chapter 2 “Important service information” on page 21.
© Copyright Lenovo 2015, 2019 iii
iv ThinkPad P50 Hardware Maintenance Manual
Chapter 1. Safety information
This chapter presents following safety information that you need to be familiar with before you service a
ThinkPad notebook computer.
• “General safety” on page 1
• “Electrical safety” on page 1
• “Safety inspection guide” on page 2
• “Handling devices that are sensitive to electrostatic discharge” on page 3
• “Grounding requirements” on page 4
• “Safety notices (multilingual translations)” on page 4
General safety
Follow these rules to ensure general safety:
• Observe good housekeeping in the area of the machines during and after maintenance.
• When lifting any heavy object:
1. Make sure that you can stand safely without slipping.
2. Distribute the weight of the object equally between your feet.
3. Use a slow lifting force. Never move suddenly or twist when you attempt to lift.
4. Lift by standing or by pushing up with your leg muscles; this action removes the strain from the
muscles in your back. Do not attempt to lift any object that weighs more than 16 kg (35 lb) or that you
think is too heavy for you.
• Do not perform any action that causes hazards to the customer, or that makes the equipment unsafe.
• Before you start the machine, make sure that other service technicians and the customer's personnel are
not in a hazardous position.
• Place removed covers and other parts in a safe place, away from all personnel, while you are servicing the
machine.
• Keep your toolcase away from walk areas so that other people will not trip over it.
• Do not wear loose clothing that can be trapped in the moving parts of a machine. Make sure that your
sleeves are fastened or rolled up above your elbows. If your hair is long, fasten it.
• Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip, about 8
centimeters (3 inches) from the end.
• Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing.
Attention: Metal objects are good electrical conductors.
• Wear safety glasses when you are hammering, drilling, soldering, cutting wire, attaching springs, using
solvents, or working in any other conditions that might be hazardous to your eyes.
• After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device that
is worn or defective.
• Reinstall all covers correctly before returning the machine to the customer.
• Fan louvers on the machine help to prevent overheating of internal components. Do not obstruct fan
louvers or cover them with labels or stickers.
Electrical safety
Observe the following rules when working on electrical equipment.
Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft
material that does not insulate you when working with live electrical currents. Many customers have, near
their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges.
Do not use this type of mat to protect yourself from electrical shock.
© Copyright Lenovo 2015, 2019 1
• Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical
accident occurs, you can then operate the switch or unplug the power cord quickly.
• Do not work alone under hazardous conditions or near equipment that has hazardous voltages.
• Disconnect all power before:
– Performing a mechanical inspection
– Working near power supplies
– Removing or installing main units
• Before you start to work on the machine, unplug the power cord. If you cannot unplug it, ask the customer
to power-off the wall box that supplies power to the machine, and to lock the wall box in the off position.
• If you need to work on a machine that has exposed electrical circuits, observe the following precautions:
– Ensure that another person, familiar with the power-off controls, is near you.
Attention: Another person must be there to switch off the power, if necessary.
– Use only one hand when working with powered-on electrical equipment; keep the other hand in your
pocket or behind your back.
Attention: An electrical shock can occur only when there is a complete circuit. By observing the above
rule, you may prevent a current from passing through your body.
– When using testers, set the controls correctly and use the approved probe leads and accessories for
that tester.
– Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such as
metal floor strips and machine frames.
Observe the special safety precautions when you work with very high voltages; Instructions for these
precautions are in the safety sections of maintenance information. Use extreme care when measuring high
voltages.
• Regularly inspect and maintain your electrical hand tools for safe operational condition.
• Do not use worn or broken tools and testers.
• Never assume that power has been disconnected from a circuit. First, check that it has been powered off.
• Always look carefully for possible hazards in your work area. Examples of these hazards are moist floors,
nongrounded power extension cables, power surges, and missing safety grounds.
• Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. The surface is
conductive; such touching can cause personal injury and machine damage.
• Do not service the following parts with the power on when they are removed from their normal operating
places in a machine:
– Power supply units
– Pumps
– Blowers and fans
– Motor generators
– Similar units to listed above
This practice ensures correct grounding of the units.
• If an electrical accident occurs:
– Use caution; do not become a victim yourself.
– Switch off power.
– Send another person to get medical aid.
Safety inspection guide
The purpose of this inspection guide is to assist you in identifying potentially unsafe conditions. As each
machine was designed and built, required safety items were installed to protect users and service
technicians from injury. This guide addresses only those items. You should use good judgment to identify
potential safety hazards due to attachment of non-ThinkPad features or options not covered by this
inspection guide.
If any unsafe conditions are present, you must determine how serious the apparent hazard could be and
whether you can continue without first correcting the problem.
2ThinkPad P50 Hardware Maintenance Manual
Consider these conditions and the safety hazards they present:
• Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal
electrical shock)
• Explosive hazards, such as a damaged CRT face or a bulging capacitor
• Mechanical hazards, such as loose or missing hardware
To determine whether there are any potentially unsafe conditions, use the following checklist at the
beginning of every service task. Begin the checks with the power off, and the power cord disconnected.
Checklist:
1. Check exterior covers for damage (loose, broken, or sharp edges).
2. Power off the computer. Disconnect the power cord.
3. Check the power cord for:
a. A third-wire ground connector in good condition. Use a meter to measure third-wire ground
continuity for 0.1 ohm or less between the external ground pin and the frame ground.
b. The power cord should be the authorized type specified for your computer. Go to: http://
www.lenovo.com/serviceparts-lookup
c. Insulation must not be frayed or worn.
4. Check for cracked or bulging batteries.
5. Remove the cover.
6. Check for any obvious non-ThinkPad alterations. Use good judgment as to the safety of any non-
ThinkPad alterations.
7. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or
other liquids, or signs of fire or smoke damage.
8. Check for worn, frayed, or pinched cables.
9. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered
with.
Handling devices that are sensitive to electrostatic discharge
Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to
electrostatic discharge (ESD.) ESD damage can occur when there is a difference in charge between objects.
Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the
person handling the part are all at the same charge.
Notes:
1. Use product-specific ESD procedures when they exceed the requirements noted here.
2. Make sure that the ESD protective devices you use have been certified (ISO 9000) as fully effective.
When handling ESD-sensitive parts:
• Keep the parts in protective packages until they are inserted into the product.
• Avoid contact with other people.
• Wear a grounded wrist strap against your skin to eliminate static on your body.
• Prevent the part from touching your clothing. Most clothing is insulative and retains a charge even when
you are wearing a wrist strap.
• Use a grounded work mat to provide a static-free work surface. The mat is especially useful when
handling ESD-sensitive devices.
• Select a grounding system, such as those listed below, to provide protection that meets the specific
service requirement.
Note: The use of a grounding system to guard against ESD damage is desirable but not necessary.
– Attach the ESD ground clip to any frame ground, ground braid, or green-wire ground.
Chapter 1.Safety information 3
– When working on a double-insulated or battery-operated system, use an ESD common ground or
reference point. You can use coax or connector-outside shells on these systems.
– Use the round ground prong of the ac plug on ac-operated computers.
Grounding requirements
Electrical grounding of the computer is required for operator safety and correct system function. Proper
grounding of the electrical outlet can be verified by a certified electrician.
Safety notices (multilingual translations)
The safety notices in this section are provided in the following languages:
• English
• Arabic
• Brazilian Portuguese
• French
• German
• Hebrew
• Japanese
• Korean
• Spanish
• Traditional Chinese
DANGER
DANGER
DANGER
4ThinkPad P50 Hardware Maintenance Manual
6ThinkPad P50 Hardware Maintenance Manual
PERIGO
PERIGO
PERIGO
PERIGO
PERIGO
8ThinkPad P50 Hardware Maintenance Manual
DANGER
DANGER
DANGER
DANGER
VORSICHT
10 ThinkPad P50 Hardware Maintenance Manual
VORSICHT
VORSICHT
VORSICHT
12 ThinkPad P50 Hardware Maintenance Manual
14 ThinkPad P50 Hardware Maintenance Manual
16 ThinkPad P50 Hardware Maintenance Manual
18 ThinkPad P50 Hardware Maintenance Manual
20 ThinkPad P50 Hardware Maintenance Manual
Chapter 2. Important service information
This chapter introduces following important service information that applies to all machine types supported
by this manual:
• “Strategy for replacing FRUs” on page 21
– “Strategy for replacing a hard disk drive or a solid-state drive” on page 21
– “Important notice for replacing a system board” on page 22
– “How to use error message” on page 22
• “Strategy for replacing FRUs for CTO, special-bid, and standard models” on page 22
– “Product definition” on page 22
– “FRU identification” on page 22
Important:
• Advise customers to contact the Lenovo® Customer Support Center if they need any assistance in
obtaining or installing any software fixes, drivers, and UEFI BIOS downloads. Telephone numbers for
Lenovo Support are available at: http://www.lenovo.com/support/phone
• System Disassembly/Reassembly videos that show the FRU removals or replacements for the Lenovo
authorized service technicians are available in the following support site:
http://www.lenovoservicetraining.com/ion/
Strategy for replacing FRUs
Before replacing parts:
Ensure that all software fixes, drivers, and UEFI BIOS downloads are installed before replacing any FRUs
listed in this manual.
After a system board is replaced, ensure that the latest UEFI BIOS is loaded to the system board before
completing the service action.
To download software fixes, drivers, and UEFI BIOS, go to http://www.lenovo.com/ThinkPadDrivers and follow
the instructions on the screen.
Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs:
• If you are instructed to replace a FRU but the replacement does not correct the problem, reinstall the
original FRU before you continue.
• Some computers have both a processor board and a system board. If you are instructed to replace either
the processor board or the system board, and replacing one of them does not correct the problem,
reinstall that board, and then replace the other one.
• If an adapter or a device consists of more than one FRU, any of the FRUs may be the cause of the error.
Before replacing the adapter or device, remove the FRUs, one by one, to see if the symptoms change.
Replace only the FRU that changed the symptoms.
Strategy for replacing a hard disk drive or a solid-state drive
Always try to run a low-level format before replacing a hard disk drive or a solid-state drive. This will cause all
customer data on the drive to be lost. Be sure that the customer has a current backup of the data before
doing this task.
Attention: The drive startup sequence in the computer you are servicing may have been changed. Be
extremely careful during write operations such as copying, saving, or formatting. If you select an incorrect
drive, data or programs can be overwritten.
© Copyright Lenovo 2015, 2019 21
Important notice for replacing a system board
Some components mounted on a system board are very sensitive. Improper handling of a system board can
cause damage to those components, and may cause a system malfunction.
Attention: When handling a system board:
• Do not drop a system board or apply any excessive force to it.
• Avoid rough handling of any kind.
• Avoid bending a system board and hard pushing to prevent cracking at each BGA (Ball Grid Array)
chipset.
How to use error message
Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed,
begin the diagnosis with the first error code. Whatever causes the first error code may also cause false error
codes. If no error code is displayed, see whether the error symptom is listed in the Symptom-to-FRU Index
for the computer you are servicing.
Strategy for replacing FRUs for CTO, special-bid, and standard models
This topic provides information about the model types and FRU identification.
Product definition
This topic introduces different model types and how to identify each type.
Dynamic Configure To Order (CTO) model
This model provides the ability for a customer to configure a Lenovo solution from a Web Site, and have this
configuration sent to fulfillment, where it is built and shipped directly to the customer. The machine label and
eSupport will load these products as the 4-character MT, 4-character model, and 2-character country code.
The model is “CTO1” and the default country code is “WW” (example: 20AACTO1WW).
Special-bid model
This is a unique configuration that has been negotiated between Lenovo and the customer. A unique MTM
consists of a 4-character MT, a 4-character model, and a numeric 2-character country code is provided to
the customer to place orders (example: 20AA000955). The country code assigned is numeric and does not
designate a specific country or region. The custom model factsheet for the MTM indicates which country the
special bid MTM is set up for. Special-bid offering is not generally announced.
Standard model
Standard models (fixed configuration) are announced and offered to all customers. The MTM portion of the
machine label consists of a 4-character MT, a 4-character model, and an alphabetic 2-character country
code. The country code assigned is alphabetic and represents a designated country or region (example:
20AA0009UK).
FRU identification
Use Lenovo eSupport to identify major FRUs, FRU part numbers, and FRU descriptions for a product at an
MT - serial number level. Examples of major FRUs are hard disk drive, system board, liquid crystal display
(LCD), and memory module.
To identify the major FRUs for a product, do the following:
1. Go to:
http://support.lenovo.com/ibasepartslookup
22 ThinkPad P50 Hardware Maintenance Manual
2. Type the Machine Type and Serial Number in the corresponding fields.
3. Click Submit.
eSupport also can be used to view the general FRU list for a product. The FRU list is a general list of
components and does not contain specific model information.
To get the general FRU list for a product, do the following:
1. Go to:
http://www.lenovo.com/support
2. Follow the instructions on the screen to select a product.
3. Click Products & Parts tab.
4. Select System Service Parts to view a general FRU list.
Chapter 2.Important service information 23
24 ThinkPad P50 Hardware Maintenance Manual
Chapter 3. General checkout
This chapter introduces following information:
• “What to do first” on page 25
• “Checkout guide” on page 26
– “Lenovo Solution Center” on page 26
– “Quick test programs” on page 26
– “UEFI diagnostic program” on page 27
– “Bootable diagnostic programs” on page 27
• “Power system checkout” on page 28
Before you go to the checkout guide, be sure to read the following important notes.
Important notes:
• Only certified trained personnel should service the computer.
• Before replacing any FRU, read the entire page on removing and replacing FRUs.
• When you replace FRUs, it is recommended use new nylon-coated screws.
• Be extremely careful during such write operations as copying, saving, or formatting. The sequence
of the drives in the computer that you are servicing might have been altered. If you select an incorrect
drive, data or programs might be overwritten.
• Replace a FRU only with another FRU of the correct model. When you replace a FRU, ensure that the
model of the machine and the FRU part number are correct by referring to the web site: http://
www.lenovo.com/serviceparts-lookup
• A FRU should not be replaced because of a single, unreproducible failure. Single failures can occur
for a variety of reasons that have nothing to do with a hardware defect, such as cosmic radiation,
electrostatic discharge, or software errors. Consider replacing a FRU only when a problem recurs. If you
suspect that a FRU is defective, clear the error log and run the test again. If the error does not recur, do
not replace the FRU.
• Be careful not to replace a nondefective FRU.
What to do first
When you return a FRU, you must include the following information in the parts exchange form or parts return
form that you attach to it:
1. Name and phone number of service technician
2. Date of service
3. Date on which the machine failed
4. Date of purchase
5. Failure symptoms, error codes appearing on the display, and beep symptoms
6. Procedure index and page number in which the failing FRU was detected
7. Failing FRU name and part number
8. Machine type, model number, and serial number
9. Customer's name and address
Note: During the warranty period, the customer may be responsible for repair costs if the computer damage
was caused by misuse, accident, modification, unsuitable physical or operating environment, or improper
maintenance by the customer. Following is a list of some common items that are not covered under warranty
and some symptoms that might indicate that the system was subjected to stress beyond normal use.
© Copyright Lenovo 2015, 2019 25
Before checking problems with the computer, determine whether the damage is covered under the warranty
by referring to the following list:
The following are not covered under warranty:
• LCD panel cracked from the application of excessive force or from being dropped
• Scratched (cosmetic) parts
• Distortion, deformation, or discoloration of the cosmetic parts
• Plastic parts, latches, pins, or connectors that have been cracked or broken by excessive force
• Damage caused by liquid spilled into the system
• Damage caused by the improper insertion of a PC card or the installation of an incompatible card
• Improper disc insertion or use of an optical drive
• Fuses blown by attachment of a nonsupported device
• Forgotten computer password (making the computer unusable)
• Sticky keys caused by spilling a liquid onto the keyboard
• Use of an incorrect ac power adapter on laptop products
The following symptoms might indicate damage caused by nonwarranted activities:
• Missing parts might be a symptom of unauthorized service or modification.
• Check for obvious damage to a hard disk drive. If the spindle of a hard disk drive becomes noisy, the hard
disk drive might have been dropped or subject to excessive force.
Checkout guide
Use the following procedures as a guide in identifying and correcting problems with the ThinkPad notebook
computers.
Note: The diagnostic tests are intended to test only ThinkPad products. The use of non-ThinkPad products,
prototype cards, or modified options can lead to false indications of errors and invalid system responses.
1. Identify the failing symptoms in as much detail as possible.
2. Verify the symptoms. Try to re-create the failure by running the diagnostic test or by repeating the
operation.
Lenovo Solution Center
The Lenovo Solution Center program enables you to troubleshoot and resolve computer problems. It
combines diagnostic tests, system information collection, security status, and support information, along
with hints and tips for maximum system performance.
The Lenovo Solution Center program is available for download at http://www.lenovo.com/diags.
To run the Lenovo Solution Center program, go to Control Panel and click System and Security ➙ Lenovo -
System Health and Diagnostics, and then follow the instructions on the screen.
For more information about the Lenovo Solution Center program, refer to the help information system of the
program.
Quick test programs
Run quick test programs to troubleshoot and resolve computer problems, especially when the computer
does not have the Lenovo Solution Center program installed.
To download and install a quick test program, go to http://www.lenovo.com/diags, and follow the instructions
on the Web site.
To run a test using quick test program, do the following:
26 ThinkPad P50 Hardware Maintenance Manual
1. Go to the C:\SWTOOLS\ldiag directory.
2. Double-click the gui_lsc_lite.exe file.
3. When the User Account Control window opens, click Yes.
4. Select the device class to be tested.
5. Select the devices to be tested.
6. Select the test to be performed.
7. Follow the instructions on the screen to start the test. When a problem is detected, information
messages are displayed. Refer to the messages to troubleshoot the problem.
UEFI diagnostic program
A UEFI diagnostic program is preinstalled on the computer. It enables you to test memory modules and
internal storage devices, view system information, and check and recover bad sectors on internal storage
devices.
To run the UEFI diagnostic program, do the following:
1. Turn on the computer. If the computer cannot be turned on, go to “Power system checkout” on page 28,
and check the power sources. If an error code is displayed, go to “Symptom-to-FRU index” on page 37
for error code descriptions and troubleshooting hints.
2. When the logo screen is displayed, repeatedly press and release the F10 key. The main screen of the
UEFI diagnostic program is displayed.
3. Follow the instructions on the screen to use the diagnostic program.
Bootable diagnostic programs
If the computer you are servicing is not installed with the UEFI diagnostic program, you can download a
bootable diagnostic program from the Lenovo Support Web site. The bootable diagnostic programs enable
you to test computer memory and internal storage devices, view system information, and check and recover
the internal storage devices. To use the bootable diagnostic programs, you can create a bootable diagnostic
medium on a USB device or CD.
To create a bootable diagnostic medium, do the following:
1. Go to http://www.lenovo.com/diags.
2. Click Lenovo Bootable Diagnostics.
3. Follow the instructions on the Web site to create a bootable diagnostic medium on a USB device or CD.
To use the diagnostic medium you have created, do one of the following:
• If you have created the bootable diagnostic medium on a USB device, do the following:
1. Attach the USB device to the computer.
2. Turn on the computer. If the computer cannot be turned on, go to “Power system checkout” on page
28, and check the power sources. If an error code is displayed, go to “Symptom-to-FRU index” on
page 37 for error code descriptions and troubleshooting hints.
3. When the logo screen is displayed, repeatedly press and release the F12 key. When the Boot Menu
window opens, release the F12 key.
4. Use the arrow keys to select USB HDD and then press Enter. The diagnostic program will be
launched automatically.
5. Follow the instructions on the screen to use the diagnostic program.
• If you have created the bootable diagnostic medium on a CD, do the following:
Chapter 3.General checkout 27
1. Turn on the computer. If the computer cannot be turned on, go to “Power system checkout” on page
28, and check the power sources. If an error code is displayed, go to “Symptom-to-FRU index” on
page 37 for error code descriptions and troubleshooting hints.
2. Insert the CD into the optical drive.
3. Restart the computer.
4. When the logo screen is displayed, repeatedly press and release the F12 key. When the Boot Menu
window opens, release the F12 key.
5. Use the arrow keys to select ATAPI CDx (x: 0, 1, ...) and then press Enter. The diagnostic program will
be launched automatically.
6. Follow the instructions on the screen to use the diagnostic program.
Power system checkout
To verify if a battery or an ac power adapter is functional, do the following:
1. Turn off the computer.
2. Remove the battery.
3. Connect the ac power adapter. If the computer can be turned on, it means that the ac power adapter is
functional.
4. Turn off the computer.
5. Disconnect the ac power adapter and install the charged battery.
6. Turn on the computer. If the computer can be turned on, it means that the battery is functional.
If you suspect a power problem, see the appropriate one of the following power supply checkouts:
• “Checking the ac power adapter” on page 28
• “Checking the operational charging” on page 29
• “Checking the coin-cell battery” on page 29
Checking the ac power adapter
You are here because the computer fails only when the ac power adapter is used.
• If the power problem occurs only when the docking station or the port replicator is used, replace the
docking station or the port replicator.
• If the system status indicator does not blink three times when an ac power source is connected, check the
power cord of the ac power adapter for correct continuity and installation.
• If the computer does not charge during operation, go to “Checking the operational charging” on page 29.
To check the ac power adapter, do the following:
1. Unplug the ac power adapter cable from the computer.
2. Measure the output voltage at the plug of the ac power adapter cable. See the following illustration:
(20V)
1
3
2
Pin Voltage (V dc)
1 +20
2 0
3Ground
Note: Output voltage of pin 2 of the ac power adapter might differ from the one you are servicing.
3. If the voltage is not correct, replace the ac power adapter.
4. If the voltage is acceptable, replace the system board.
28 ThinkPad P50 Hardware Maintenance Manual
Note: Noise from the ac power adapter does not always indicate a defect.
Checking the operational charging
This computer supports only batteries specially designed for this specific system and manufactured by
Lenovo or an authorized builder. The system does not support unauthorized batteries or batteries designed
for other systems. If an unauthorized battery or a battery designed for another systems is installed, the
system will not charge.
Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out of their use.
To check whether the battery charges properly during operation, do the following:
1. Discharge the battery until the remained battery power is less than 50%.
2. Connect the computer to ac power to charge the battery. If the battery status icon in the Windows
notification area indicates that the battery is not charging, remove the battery and let it return to room
temperature.
3. Reinstall the battery. If the battery is still not charging, replace the battery pack.
4. Check the battery status icon again. If the same error still exists, replace the system board.
Checking the battery pack
To check the battery pack, do the following:
1. Turn off the computer and disconnect the ac power adapter.
2. Remove the battery pack and measure the voltage between battery terminals 1 (+) and 7 (-). The correct
voltage are shown in the following table.
1(+)2(+) 3456(-)7(-)
Terminal Voltage (V dc)
1 + 0 to + 12.6
7Ground (-)
3. Measure the resistance between battery terminals 5 and 7. The resistance must be 4 to 30 K Ω. If the
resistance is not correct, replace the battery pack.
4. Depending on the voltage that you measure, do one of the following:
• If the voltage is less than +11.0 V dc, recharge the battery pack. If the voltage is still less than +11.0 V
dc after recharging, replace the battery pack.
• If the voltage is more than +11.0 V dc, discharge the battery pack until the voltage becomes less than
+11.0 V dc and then recharge the battery pack. If the voltage still is less than +11.0 V dc after
recharging, replace the battery pack.
Note: Recharging will take at least three hours, even if the battery status indicator does not turn on.
5. Replace the system board if the new battery pack is not charged.
Checking the coin-cell battery
To check the coin-cell battery, do the following:
Chapter 3.General checkout 29
1. Remove the battery pack. See “1010 Battery” on page 67.
2. Remove the coin-cell battery. See “1050 Coin-cell battery” on page 74.
3. Measure the voltage of the coin-cell battery. See the following illustration.
Wire Voltage (V dc)
Red +2.5 to +3.2
Black Ground
• If the voltage is correct, replace the system board.
• If the voltage is not correct, replace the coin-cell battery.
• If the coin-cell battery discharges quickly after replacement, replace the system board.
30 ThinkPad P50 Hardware Maintenance Manual
Chapter 4. Related service information
This chapter presents following information:
• “Restoring the factory contents by using the Recovery Disc Set” on page 31
• “Recovery overview for the Windows 10 operating system” on page 32
• “Passwords” on page 34
• “Power management” on page 36
• “Symptom-to-FRU index” on page 37
Service Web site: When the latest maintenance diskette and the system program service diskette become
available, they will be posted on http://www.lenovo.com/support
Restoring the factory contents by using the Recovery Disc Set
When the main storage drive is replaced because of a failure, no product recovery program is on the new
drive. In this case, the customer must use the Recovery Disc Set to recover the computer. Order the
Recovery Disc Set and the drive at the same time so that the customer can restore the computer to the
factory default settings by using the Recovery Disc Set after the new drive is installed. For information about
which discs to order, go to http://www.lenovo.com/serviceparts-lookup.
Depending on the model, the number of recovery discs included in the Recovery Disc Set differs. The
Recovery Disc Set might consist of the user instructions and the following set of DVDs to restore the
computer to the original factory configuration.
• Operating System Recovery Disc (one disc): This disc restores the Microsoft Windows operating system.
Use this disc to start the recovery process.
• Applications and Drivers Recovery Disc (one or more discs): This disc restores the preinstalled
applications and drivers on the computer.
• Supplemental Recovery Disc: This disc contains additional content, such as updates to the software that
was preinstalled on the computer. Not all recovery disc sets come with a Supplemental Recovery Disc.
Notes:
• You must have a DVD drive to use the recovery discs. If you do not have an internal DVD drive, you can
use an external USB DVD drive.
• During the recovery process, all data on the drive will be deleted. If possible, copy any important data or
personal files that you want to keep onto removable media or a network drive before you start the
recovery process.
To restore the computer to the original factory configuration using the Recovery Disc Set, do the following:
Note: Recovery can take one to two hours to complete. The length of time depends on the method you use.
If you use recovery discs, the recovery process will take about two hours.
1. Make the CD/DVD drive the first startup device in the startup sequence using the following procedure:
a. Press and hold down the F1 key, and then turn on the computer. When the logo screen is displayed
or when you hear repeating beeps, release the F1 key. The ThinkPad Setup program opens.
b. Use the arrow keys to select Startup ➙ Boot.
c. Select the CD/DVD drive as the 1st Boot Device.
2. Insert the Operating System Recovery Disc into the DVD drive.
3. Press F10 to save the ThinkPad Setup program configuration changes. Follow the instructions on the
screen to begin the recovery process.
© Copyright Lenovo 2015, 2019 31
4. Select your language and click Next.
5. Read the license. If you agree with the terms and conditions, select I accept these terms and
conditions and then click Next. If you do not agree with the terms and conditions, follow the
instructions on the screen.
6. Click Yes in the displayed window to begin the operating system recovery process.
7. Insert the Applications and Drivers Recovery Disc when prompted and then click OK to begin the
process of recovering applications and drivers.
8. If you have a Supplemental Recovery Disc, insert it when prompted and click Yes. If you do not have a
Supplemental Recovery Disc, click No.
9. When all of the data has been copied from the last disc in the set and has been processed, remove the
disc and restart the computer.
Note: The rest of the recovery process is fully automated and no action from you is required. The
computer will restart into the Microsoft Windows desktop several times and you might experience
periods when no activity is apparent on the screen for several minutes at a time. This is normal.
10. When the recovery process is complete, the Set Up Windows screen is displayed. Follow the
instructions on the screen to complete the Windows setup.
11. After you have completed the Windows setup, you might want to restore the original startup sequence.
Start the ThinkPad Setup program and then press F9 to restore the default settings. Press F10 to save
changes and exit the ThinkPad Setup program.
Note: After restoring a drive to the factory default settings, you might need to reinstall some device drivers.
Recovery overview for the Windows 10 operating system
The Windows recovery programs enable you to reset your computer or use advanced startup options.
It is recommended that you create a recovery USB drive as early as possible. Store the recovery USB drive
as a backup or replacement for the Windows recovery programs.
For more information, see “Creating and using a recovery USB drive” on page 33.
Resetting your computer
If your computer does not perform well, you might consider resetting your computer. In the resetting
process, you can choose to keep your files or remove them, and then reinstall the Windows operating
system.
To reset your computer, do the following:
Note: The graphical user interface (GUI) items of the operating system might change without notice.
1. Open the Start menu and then click Settings. If Settings is not displayed, click All apps to display all
programs, and then click Settings ➙ Update & security ➙ Recovery.
2. In the Reset this PC section, click Get started.
3. Follow the instructions on the screen to reset your computer.
Using advanced startup options
With advanced startup options, you can change the firmware settings of the computer, change the startup
settings of the Windows operating system, start the computer from an external device, or restore the
Windows operating system from a system image.
To use advanced startup options, do the following:
32 ThinkPad P50 Hardware Maintenance Manual
Note: The GUI items of the operating system might change without notice.
1. Open the Start menu and then click Settings. If Settings is not displayed, click All apps to display all
programs, and then click Settings ➙ Update & security ➙ Recovery.
2. In the Advanced startup section, click Restart now ➙ Troubleshoot ➙ Advanced options.
3. Select a desired startup option, then follow the instructions on the screen.
Recovering your operating system if Windows 10 fails to start
The Windows recovery environment on your computer is capable of operating independently from the
Windows 10 operating system. This enables you to recover or repair the operating system even if the
Windows 10 operating system fails to start.
After two consecutive failed boot attempts, the Windows recovery environment starts automatically. Then
you can choose repair and recovery options by following the instructions on the screen.
Note: Ensure that your computer is connected to ac power during the recovery process.
Creating and using a recovery USB drive
You can create a recovery USB drive as a backup for the Windows recovery programs. With the recovery
USB drive, you can troubleshoot and fix the problems even if the preinstalled Windows recovery programs
are damaged.
Creating a recovery USB drive
The USB drive that you use to create the recovery USB drive must be at least 16 GB of storage. The actual
USB capacity that is required depends on the size of the recovery image.
Attention: The creation process deletes anything stored on the USB drive. To avoid data loss, make a
backup copy of all the data that you want to keep.
To create a recovery USB drive, do the following:
Note: Ensure that your computer is connected to ac power during the following process.
1. Connect a proper USB drive (at least 16 GB of storage).
2. Type recovery in the search box on the taskbar. Then click Create a recovery drive.
3. Click Yes in the User Account Control window to allow the Recovery Media Creator program to start.
4. In the Recovery Drive window, follow the on-screen instructions to create a recovery USB drive.
Using the recovery USB drive
If you cannot start your computer, use the recovery USB drive to recover your computer.
To use a recovery USB drive, do the following:
Note: Ensure that your computer is connected to ac power.
1. Connect the recovery USB drive to the computer.
2. Turn on or restart the computer. Before the Windows operating system starts, repeatedly press the F12
key. The Boot Menu window opens.
3. Select the recovery USB drive as the boot device.
4. Select a preferred keyboard layout.
5. Click Troubleshoot to display the optional recovery solutions.
Chapter 4.Related service information 33
6. Select a corresponding recovery solution according to your situation. Then follow the instructions on the
screen to complete the process.
Passwords
As many as three passwords may be needed for any ThinkPad notebook computer: the power-on password,
the hard disk password, and the supervisor password.
If any of these passwords has been set, a prompt for it will be displayed on the screen whenever the
computer is turned on. The computer does not start until the password is entered.
Note: If only a supervisor password is set, the password prompt will not be displayed when the operating
system is started.
Power-on password
A power-on password protects the system from being powered on by an unauthorized person. The
password must be entered before an operating system can be started. For instructions on how to remove the
power-on password, see “How to remove the power-on password” on page 35.
Hard disk password
There are two kinds of hard disk passwords:
• User hard disk password - for the user
• Master hard disk password - for the system administrator, who can use it to get access to the hard disk
even if the user has changed the user hard disk password
Note: There are two modes for the hard disk password: User only and Master + User. The Master + User
mode requires two hard disk passwords; the system administrator enters both in the same operation. The
system administrator then provides the user hard disk password to the system user.
Attention: If the user hard disk password has been forgotten, check whether a master hard disk password
has been set. If it has, it can be used for access to the hard disk drive. If no master hard disk password is
available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the
user or the master hard disk password, or to recover data from the hard disk drive. The hard disk drive can
be replaced for a scheduled fee.
For how to remove the hard disk password, see “How to remove the hard disk password” on page 35.
Supervisor password
The supervisor password protects the system information stored in the ThinkPad Setup program. It provides
the following security features:
• If only a supervisor password is set, a password prompt is displayed when you try to start the ThinkPad
Setup program. Unauthorized users cannot change most of the system configuration options in the
ThinkPad Setup program without the password.
• The system administrator can use the supervisor password to access a computer even if the user of that
computer has set a power-on password. The supervisor password overrides the power-on password.
• The system administrator can set the same supervisor password on many ThinkPad notebook computers
to make administration easier.
Attention: If the supervisor password has been forgotten and cannot be made available to the service
technician, there is no service procedure to reset the password. The system board must be replaced for a
scheduled fee.
34 ThinkPad P50 Hardware Maintenance Manual
How to remove the power-on password
To remove a power-on password, do the following:
If no supervisor password has been set, do the following to remove the power-on password:
1. Turn off the computer.
2. Remove the battery pack. For instructions on how to remove the battery pack, see “1010 Battery” on
page 67.
3. Remove the coin-cell battery. For instructions on how to remove the coin-cell battery, see “1050 Coin-
cell battery” on page 74. Wait for a few seconds.
4. Reinstall the coin-cell battery. For instructions on how to install the coin-cell battery, see “1050 Coin-cell
battery” on page 74.
5. Reinstall the battery pack. For instructions on how to install the battery pack, see “1010 Battery” on
page 67.
6. Turn on the computer and wait until the POST ends. After the POST ends, the password prompt does
not appear. The power-on password has been removed.
If a supervisor password has been set and is known to the service technician, do the following to remove the
power-on password:
1. Turn on the computer.
2. When the Lenovo logo is displayed, immediately press F1.
3. Type the supervisor password to enter the ThinkPad Setup program.
4. Select Security.
5. Select Password.
6. Select Power-On Password.
7. Type the current supervisor password in the Enter Current Password field. then leave the Enter New
Password field blank, and press Enter twice.
8. In the Changes have been saved window, press Enter.
9. Press F10 to save changes and exit the ThinkPad Setup program.
How to remove the hard disk password
Attention: If User only mode is selected and the user hard disk password has been forgotten and cannot be
made available to the service technician, neither Lenovo nor Lenovo authorized service technicians provide
any services to reset the user hard disk passwords or to recover data from the hard disk drive. To put the
system back to operational status, the only Lenovo and Lenovo-authorized service solution would be to
replace the hard disk drive or solid-state drive with a scheduled fee.
To remove a user hard disk password that has been forgotten, when the supervisor password and master
hard disk password are known, do the following:
1. Turn on the computer.
2. When the logo screen comes up, immediately press F1 to enter the ThinkPad Setup program.
3. Select Security.
4. Select Password.
5. Select Hard-disk x password, where x is the letter of the hard disk drive. A pop-up window opens.
6. Select Master hard disk password.
7. Type the current master hard disk password in the Enter Current Password field. Then leave the Enter
New Password field blank, and press Enter twice.
8. Press F10.
Chapter 4.Related service information 35
9. Press F10 to save changes and exit the ThinkPad Setup program. The user hard disk password and the
master hard disk password have been removed.
Power management
To reduce power consumption, the computer has three power management modes: screen blank, sleep, and
hibernation.
Screen blank mode (for Windows 7 only)
If the time set on the “Turn off monitor” timer in the operating system expires, the LCD backlight turns off.
To put the computer into screen blank mode, do the following:
1. Right-click the battery gauge on the taskbar.
2. Select Power off display.
To end screen blank mode and resume normal operation, press any key.
Sleep mode
When the computer enters sleep mode, the following events occur in addition to what occurs in screen blank
mode:
• The LCD is powered off.
• The hard disk drive or solid-state drive is powered off.
• The microprocessor stops.
To put your computer into sleep mode, press Fn+4 or do the following:
• For Windows 7: Open the Start menu, then click the arrow next to the Shutdown button. Click Sleep from
the menu displayed.
• For Windows 10: Open the Start menu, click Power, and then click Sleep.
To return to normal operation, press the Fn key only.
In certain circumstances, the computer goes into sleep mode automatically:
• After a period of inactivity specified in power plan settings
• When the battery power is low
Hibernation mode
In hibernation mode, the following occurs:
• The system status, RAM, VRAM, and setup data are stored on the hard disk drive or solid-state drive.
• The system is powered off.
Note: If the computer enters the hibernation mode while it is docked to the docking station or the port
replicator, do not undock it before resuming normal operation. If you do undock it and then try to resume
normal operation, you will get an error message, and you will have to restart the system.
If you have defined one of the following actions as the event that causes the system to go into hibernation
mode, perform that action.
• Closing the lid.
• Pressing the power button.
36 ThinkPad P50 Hardware Maintenance Manual
Also, the computer goes into hibernation mode automatically after a period of inactivity specified in power
plan settings.
When the power is turned on, the computer returns from hibernation mode and resumes operation. The
hibernation file in the boot record on the hard disk drive or solid-state drive is read, and system status is
restored from the hard disk drive or solid-state drive.
Symptom-to-FRU index
This section contains following information:
• “Numeric error codes” on page 37
• “Error messages” on page 39
• “Beep symptoms” on page 39
• “No-beep symptoms” on page 40
• “LCD-related symptoms” on page 40
• “Intermittent problems” on page 40
• “Undetermined problems” on page 41
The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most
likely cause is listed first, in boldface type.
Note: Do the FRU replacement or other actions in the sequence shown in the column headed “FRU or
action, in sequence.” If replacing a FRU does not solve the problem, put the original part back in the
computer. Do not replace a nondefective FRU.
This index can also help you determine, during regular servicing, what FRUs are likely to need to be replaced
next.
A numeric error is displayed for each error detected in POST or system operation. In the displays, n can be
any number.
If no numeric code is displayed, check the narrative descriptions of symptoms. If the symptom is not
described there, go to “Intermittent problems” on page 40.
Note: For a device not supported by diagnostic codes in the ThinkPad notebook computers, see the manual
for that device.
Numeric error codes
Table 1. Numeric error codes
Symptom or error FRU or action, in sequence
0177
Bad SVP data, stop POST task—The checksum of the
supervisor password in the EEPROM is not correct.
Replace the system board.
0183
Bad CRC of Security Settings in EFI Variable. Enter the
ThinkPad Setup program. – The checksum of the Security
settings in the EFI Variable is not correct.
1. Run the ThinkPad Setup program. The settings
will be corrected automatically. Then save the
current settings by pressing F10.
2. Replace the system board.
0187
EAIA data access error—The access to EEPROM is failed.
Replace the system board.
0188
Invalid RFID Serialization Information Area.
Replace the system board.
Chapter 4.Related service information 37
Table 1. Numeric error codes (continued)
Symptom or error FRU or action, in sequence
0189
Invalid RFID configuration information area—The
EEPROM checksum is not correct.
Replace the system board.
0190
Critical low-battery error
1. Charge the battery pack.
2. Replace the battery pack.
0191
System Security—Invalid Remote Change requested.
1. Run the ThinkPad Setup program, and then save
current setting by pressing F10.
2. Replace the system board.
0199
System Security— Security password retry count
exceeded.
1. Run the ThinkPad Setup program. The retry count
will be reset. Then save the current settings by
pressing F10.
2. Replace the system board.
1802
Unauthorized network card is plugged in—Turn off and
remove the network card.
1. Remove network card.
2. Replace the system board.
1820
More than one external fingerprint reader is attached.
Power off and remove all but the reader that you set up
within your main operating system.
Remove all but the reader that you set up for the
authentication.
2100
Detection error on HDD0 (Main HDD)
1. Reseat the hard disk drive.
2. Replace the main hard disk drive.
3. Replace the system board.
2101
Detection error on SSD1 (M.2)
1. Reseat the M.2 solid-state drive.
2. Replace the M.2 solid-state drive.
3. Replace the system board.
2102
Detection error on SSD2 (M.2)
1. Reseat the M.2 solid-state drive.
2. Replace the M.2 solid-state drive.
3. Replace the system board.
2110
Read error on HDD0 (Main HDD)
1. Reseat the hard disk drive.
2. Replace the main hard disk drive.
3. Replace the system board.
2111
Read error on SSD1 (M.2)
1. Reseat the M.2 solid-state drive.
2. Replace the M.2 solid-state drive.
3. Replace the system board.
2112
Read error on SSD2 (M.2)
1. Reseat the M.2 solid-state drive.
2. Replace the M.2 solid-state drive.
3. Replace the system board.
2200
Machine Type and Serial Number are invalid.
Replace the system board.
2201
Machine UUID is invalid
Replace the system board.
38 ThinkPad P50 Hardware Maintenance Manual
Error messages
Table 2. Error messages
Symptom or error FRU or action, in sequence
Fan error. 1. Replace the fan.
2. Apply thermal grease.
3. Replace the system board.
One fan error. 1. Replace the fan.
2. Apply thermal grease.
3. Replace the system board.
Thermal sensing error. Replace the system board.
The non-volatile system UEFI variable storage is nearly
full.
Press F1 to enter ThinkPad Setup after the error message
is displayed. Then clean up the storage.
The battery installed is not supported by this system and
will not charge. Please replace the battery with the correct
Lenovo battery for this system. Press the ESC key to
continue.
Replace the battery.
This system does not support batteries that are not
genuine Lenovo made or authorized. The system will
continue to boot, but may not charge unauthorized
batteries. Press the ESC key to continue.
Attention: Lenovo has no responsibility for the
performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out
of their use.
Replace the battery.
Beep symptoms
Table 3. Beep symptoms
Symptom or error FRU or action, in sequence
One short beep, pause, three short beeps, pause, three
more short beeps, pause, and one short beep (1–3–3–1
beeps)
1. Replace the memory module.
2. Replace the system board.
One long and two short beeps Replace the system board.
Three short beeps, pause, one short beep, pause, one
more short beep, pause, and three short beeps (3–1–1–3
beeps)
Have the computer serviced.
Four cycles of four short beeps Replace the system board.
Five short beeps, pause, five more short beeps, and
pause
Replace the system board.
Five short beeps Replace the system board.
Chapter 4.Related service information 39
No-beep symptoms
Table 4. No-beep symptoms
Symptom or error FRU or action, in sequence
No beep, power-on indicator on, LCD blank, and no
POST.
1. Ensure that every connector is connected tightly
and correctly.
2. Reseat memory module.
3. Replace the system board.
No beep, power-on indicator on, and LCD blank during
POST. 1. Reseat memory module.
2. Replace the system board.
The power-on password prompt appears. A power-on password or a supervisor password is set.
Type the password and press Enter.
The hard-disk password prompt appears. A hard disk password is set. Type the password and
press Enter.
LCD-related symptoms
Important: The TFT LCD for the notebook computer contains many thin-film transistors (TFTs). The
presence of a small number of dots that are missing, discolored, or always lighted is characteristic of TFT
LCD technology, but excessive pixel problems can cause viewing concerns.If the LCD you are servicing has
two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more
visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced.
Notes:
• This policy applies to all ThinkPad notebooks purchased on 1 January, 2008 or later.
• Lenovo will not provide warranty replacement if the LCD is within specifications because we cannot
guarantee that any replacement LCD will have zero pixel defects.
• One pixel consists of R, G, B sub-pixels.
Table 5. LCD-related symptoms
Symptom or error FRU or action, in sequence
No beep, power-on indicator on, and a blank LCD during
POST.
Replace the system board.
• LCD backlight not working.
• LCD too dark.
• LCD brightness cannot be adjusted.
• LCD contrast cannot be adjusted.
1. Reseat the LCD connectors.
2. Replace the LCD assembly.
3. Replace the system board.
• LCD screen unreadable.
• Characters missing pixels.
• Screen abnormal.
• Wrong color displayed.
1. See important note for “LCD-related symptoms.”
2. Reseat all LCD connectors.
3. Replace the LCD assembly.
4. Replace the system board.
Horizontal or vertical lines displayed on LCD. Replace the LCD assembly.
Intermittent problems
Intermittent system hang problems can be due to a variety of causes that have nothing to do with a hardware
defect, such as cosmic radiation, electrostatic discharge, or software errors. FRU replacement should be
considered only when a problem recurs.
40 ThinkPad P50 Hardware Maintenance Manual
When analyzing an intermittent problem, do the following:
1. Run the diagnostic test for the system board in loop mode at least 10 times.
2. If no error is detected, do not replace any FRUs.
3. If any error is detected, replace the FRU shown by the FRU code. Rerun the test to verify that no more
errors exist.
Undetermined problems
If the diagnostic tests did not identify the adapter or device that has failed, if wrong devices are installed, or if
the system simply is not operating, follow these procedures to isolate the failing FRU (do not isolate FRUs
that have no defects).
Verify that all attached devices are supported by the computer.
Verify that the power supply being used at the time of the failure is operating correctly. See “Power system
checkout” on page 28.
1. Turn off the computer.
2. Visually check each FRU for damage. Replace any damaged FRU.
3. Remove or disconnect all of the following devices:
a. Non-ThinkPad devices
b. Devices attached to the docking station or the port replicator
c. Printer, mouse, and other external devices
d. Battery pack
e. Hard disk drive or solid-state drive
f. External diskette drive or optical drive
g. Memory module
h. PC cards
4. Turn on the computer.
5. Determine whether the problem has been solved.
6. If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
7. If the problem remains, replace the following FRUs one at a time (do not replace a nondefective FRU):
a. System board
b. LCD assembly
Chapter 4.Related service information 41
42 ThinkPad P50 Hardware Maintenance Manual
Chapter 5. Configuring RAID
Some ThinkPad P50 models support RAID.
RAID, an acronym for Redundant Array of Independent Disks, is a technology that provides increased
storage functions and reliability through redundancy.
When a group of independent physical storage drives is set up to use RAID technology, they are in a RAID
array. This array distributes data across multiple storage drives, but the array appears to the host computer
as one single storage unit. Creating and using RAID arrays provides high performance, such as the expedited
I/O performance, because several drives can be accessed simultaneously.
RAID drive groups configured according to certain RAID levels also improve data storage reliability and fault
tolerance compared with single-drive storage systems. Data loss resulting from a drive failure can be
prevented by reconstructing missing data from the remaining drives.
Supported RAID levels
If the computer model supports RAID, it supports either RAID 0 or RAID 1.
• RAID 0 - striped disk array
Better performance but no redundancy and fault tolerance
• RAID 1 - mirrored disk array
Improved reading performance and complete data redundancy with only a minimal write performance
reduction
Important notices before configuring RAID
• Before you start configuring RAID, check the current RAID settings and drive configurations on the
computer and confirm with the customer.
• To support RAID 0 or RAID 1, the computer must be equipped with two identical storage drives (two
HDDs or M.2 SSDs with the same capacity).
Enabling RAID from ThinkPad Setup
For RAID-supported models, RAID is enabled by default.
Note: After the BIOS is formatted or the system board is replaced for the RAID-supported models, ensure
that RAID is enabled in ThinkPad Setup.
If you have to enable RAID manually, do the following:
1. Enter the ThinkPad Setup program.
2. Select Config ➙ RAID ➙ RAID Mode Option and then enable it.
3. Press F10 to save changes and exit.
Attention: After you enable RAID, reinstall the operating system before taking any further RAID-related
action.
Configuring RAID drive settings from ThinkPad Setup
To configure RAID drive settings, do the following:
1. Enter the ThinkPad Setup program.
© Copyright Lenovo 2015, 2019 43
2. Select Config ➙ RAID ➙ RAID Storage.
3. Depending on which type of internal storage drive is installed, select either SATA HDD or M.2 SSD, and
then follow the instructions on the screen.
Creating RAID volumes
To create RAID volumes, do the following:
1. Enter the ThinkPad Setup program.
2. Select Config ➙ RAID ➙ Intel(R) Rapid Storage Technology ➙ Create RAID Volume.
3. Select a storage drive (or a drive group) and follow the instructions on the screen to create RAID
volumes.
Attention: All the existing data stored on the selected drive will be erased while the RAID volume is
being created.
4. Exit the configuration utility.
Deleting RAID volumes
To delete a RAID volume, do the following:
1. Enter the ThinkPad Setup program.
2. Select Config ➙ RAID ➙ Intel(R) Rapid Storage Technology.
3. Select the RAID volume to be deleted, and then press Enter.
4. Follow the instructions on the screen to delete the selected RAID volume.
5. Exit the configuration utility.
44 ThinkPad P50 Hardware Maintenance Manual
Chapter 6. Special keys
Your computer has several special keys to help you work easily and effectively.
Table 6. Special keys
Function key and key
combination
Description
Mutes or unmutes the speakers.
If you mute the sound and turn off your computer, the sound will remain muted when
you turn on your computer again. To turn on the sound, press the volume-down key
or volume-up key .
Decreases the speaker volume.
Increases the speaker volume.
Mutes or unmutes the microphones.
Darkens the computer display.
Brightens the computer display.
Manages external displays.
Enables or disables the wireless features.
For Windows 10: Opens the Settings window.
For Windows 7: Opens Control Panel.
Windows 10: Opens the Cortana® search box.
For Windows 7: Opens Windows Search.
Views the programs that you have opened.
For Windows 7: Opens Computer.
For Windows 10: Views all the programs.
+
FnLk
Press Fn+Esc to enable or disable the Fn Lock function.
• When the Fn Lock function is disabled: The Fn Lock indicator is off. To initiate the
special function of each function key, press the corresponding function key directly.
To input F1- F12, press the Fn key and the corresponding function key.
• When the Fn Lock function is enabled: The Fn Lock indicator turns on. To input F1-
F12, press the corresponding function key directly. To initiate the special function of
each function key, press the Fn key and the corresponding function key.
Alternatively, you can configure the Fn key and function keys in the Keyboard Properties
window by doing the following:
1. Go to Control Panel, then change the view of Control Panel from Category to Large
icons or Small icons.
2. Click Keyboard. In the Keyboard Properties window, click the Fn and function
keys tab.
3. Select the option of your preference:
© Copyright Lenovo 2015, 2019 45
Table 6. Special keys (continued)
Function key and key
combination
Description
+ Controls the keyboard backlight.
There are three modes for the keyboard backlight: Off, Low, and High. Press Fn
+Spacebar to change the modes of the keyboard backlight.
Fn+4 Puts your computer into sleep mode. To return to normal operation, press the Fn key
only.
Fn+B Has the same function as the Break key on a conventional keyboard.
Fn+P Has the same function as the Pause key on a conventional keyboard.
Fn+S Has the same function as the SysRq key on a conventional keyboard.
Fn+K Has the same function as the ScrLK key on a conventional keyboard.
46 ThinkPad P50 Hardware Maintenance Manual
Chapter 7. Locations
This chapter introduces the locations of the hardware components on your computer.
Locating computer controls, connectors, and indicators
This topic introduces the locations of the computer controls, connectors, and indicators.
Front view
22
3
4
1
5
11
13
14
15
12
678910
1 Camera (available on some models) 2 Microphones (available on some models)
3 Screen (multi-touch on some models) 4 Power button
5 Numeric keypad 6 Security-lock slot
7 Fan louvers 8 Mini DisplayPort® connector
9 USB 3.0 connectors 10 Audio connector
11 Fingerprint reader 12 TrackPoint® device
13 Trackpad with buttons 14 Color sensor (available on some models)
15 Speakers
© Copyright Lenovo 2015, 2019 47
Rear view
1
6
6
7
8
9
11 10
12
2 3 4 5
1 Ethernet connector 2 Fan louvers
3 ExpressCard slot 4 Media-card slot
5 Smart-card slot (available on some models) 6 Fan louvers
7 Power connector 8 HDMI connector
9 Thunderbolt™ 3 connector 10 Ethernet connector
11 USB 3.0 connector 12 Always On USB 3.0 connector
Bottom view
4
5
13
2
1 Micro-SIM-card slot 2 Fan louvers
3 Docking station connector 4 Keyboard drainage hole
5 Battery
Status indicators
This topic presents the status indicators that show the status of the computer.
48 ThinkPad P50 Hardware Maintenance Manual
1
6
NumLock
2
3
45
7 8
9
10
Table 7. Status indicators
Indicator Meaning
1 Camera-status indicator On: The camera is in use.
2 9 System-status indicator Blinking three times: The computer is initially connected to power.
On: The computer is on (in normal mode).
Blinks slowly: The computer is in sleep mode.
Blinks fast: The computer is entering sleep or hibernation mode.
Off: The computer is off or in hibernation mode.
Chapter 7.Locations 49
Table 7. Status indicators (continued)
Indicator Meaning
3 Microphone-mute indicator On: The microphones are muted.
4 Speaker-mute indicator On: The speakers are muted.
5 Numeric Lock indicator On: The numeric keypad can be used to input numbers.
6 Caps Lock indicator On: The Caps Lock mode is enabled. You can type all alphabetic characters (A-
Z) in upper case directly.
7 Fn Lock indicator Off: The Fn Lock function is disabled. To initiate the special function of each key,
press the corresponding function key directly. To input F1- F12, press the Fn key
and the corresponding function key.
On: The Fn Lock function is enabled. To input F1- F12, press the corresponding
function key directly. To initiate the special function of each key, press the Fn key
and the corresponding function key.
For more information, see Chapter 6 “Special keys” on page 45.
8 Device-access-status indicator Blinking: The storage device of your computer is reading or writing data. During
this period, do not put the computer into sleep mode, remove the storage device,
or turn off the computer.
10 ac power-status indicator The ac power-status indicator shows the ac power charging status of the
computer.
• Green: Connected to ac power (charging 80%–100%)
• Amber: Connected to ac power (charging 1%–80%)
• Off: Not connected to ac power (no charging)
Locating FRUs and CRUs
This topic introduces the following service parts:
• “Major FRUs” on page 52
• “LCD FRUs” on page 54
• “Miscellaneous parts ” on page 56
50 ThinkPad P50 Hardware Maintenance Manual
Notes:
• Each FRU is available for all types or models, unless otherwise specified.
• CRU statement for customers:
You can resolve some problems with your product with a replacement part you can install yourself, called a
“Customer Replaceable Unit” or “CRU.” Some CRUs are designated as self-service CRUs and others are
designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For optional-service
CRUs, you can either install the CRU yourself or you can request that a Service Provider install the CRU according to
the warranty service for your product. If you intend on installing the CRU, Lenovo will ship the CRU to you. CRU
information and replacement instructions are shipped with your product and are available from Lenovo at any time
upon request. You can find a list of CRUs for your product in this Hardware Maintenance Manual. An electronic
version of this manual can be found at http://www.lenovo.com/UserManuals. Follow the on-screen instructions to find
the manual for your product. You might be required to return the defective part that is replaced by the CRU. When
return is required: (1) return instructions, a prepaid shipping label, and a container will be included with the
replacement CRU; and (2) you might be charged for the replacement CRU if Lenovo does not receive the defective
CRU within thirty (30) days of your receipt of the replacement CRU. See your Lenovo Limited Warranty
documentation for full details.
ThinkPad computers contain the following types of CRUs and FRU:
– Self-service CRUs: Refer to parts that can be installed or replaced easily by customer themselves or by trained
service technicians at an additional cost.
– Optional-service CRUs: Refer to parts that can be installed or replaced by customers with a greater skill level.
Trained service technicians can also provide service to install or replace the parts under the type of warranty
designated for the customer’s machine.
– FRUs: Refer to parts that must be installed or replaced only by trained service technicians. If customers choose
to replace the FRUs by themselves, the product warranty might be affected.
• FRUs marked with OP are available as options.
Chapter 7.Locations 51
Major FRUs
1
2
3
5
4
6
7
11
8
10
12
13
14
15
16
17
31
29
30
23
21
20
18
19
22
24
25
28
26
27
9
52 ThinkPad P50 Hardware Maintenance Manual
Table 8. Major FRUs
No. FRU descriptions Self-service
CRU
Optional-service
CRU
1LCD unit (see “LCD FRUs” on page 54) No No
2 Keyboard No Yes
3 Keyboard bezel assembly No No
4 Memory module bracket No Yes
5Memory module under the keyboard No Yes
6Chassis assembly No No
7Speaker assembly No No
8 Thermal fan assembly No No
9 Memory module under the bottom cover Yes No
10 Wireless WAN card *No Yes
11 Wireless LAN card No Yes
12 Base cover assembly No No
13 Hard disk drive cable Yes No
14 Hard disk drive Yes No
15 Battery Yes No
16 Lenovo factory recovery USB key *No No
17 Lenovo recovery disc set *No No
18 Power cord Yes No
19 ac power adapter Yes No
20 Bottom cover Yes No
21 M.2 solid-state drive Yes No
22 M.2 solid-state drive tray Yes No
23 Coin-cell battery Yes No
24 Hinge caps No No
25 System board No No
26 Smart card reader and smart card reader cable *No No
27 Dummy smart card reader *No No
28 Fingerprint reader cable No No
29 Color sensor cable * No No
30 Trackpad cable No No
31 TrackPoint cap OP No No
Notes:
• Depending on the model, the FRU marked with asterisk (*) might not be available on your computer.
Chapter 7.Locations 53
• The Lenovo factory recovery USB key 16 and the Lenovo recovery disc set 17 are used to restore the
Microsoft Windows operating system. They might not come with the computer, and a user might order
them from http://www.lenovo.com/lenovorecovery, though additional shipping and handling fees might
apply.
LCD FRUs
For models without touch function:
1
2
4
5
6
7
8
9
3
Table 9. LCD FRUs
N-
o.
FRU descriptions Self-service
CRU
Optional-service
CRU
1LCD bezel assembly No No
2LCD panel No No
3 Bezel support rubber * No No
4LCD rear cover assembly No No
5Hinge assembly No No
6 LED and camera cable No No
7 Antenna kit No No
8 LED card No No
9LCD cable No No
Note: Depending on the model, the FRU marked with asterisk (*) might not be available on your computer.
For models with touch function:
54 ThinkPad P50 Hardware Maintenance Manual
Miscellaneous parts
Table 11. Miscellaneous parts
FRU descriptions Self-service
CRU
Optional-service
CRU
Screw kit
• M2 × 2, silver
• M2 × 3, black
• M2 × 2.2 + 2.3L
• M2 × 1.2
• M2.5 × 4, silver
• M2.5 × 5, black
• M2.5 × 8, black
No No
System kit
• Gasket for the color sensor
• Gasket for the fingerprint reader
• Mylar for screw
• Mylar for fingerprint reader
• Speaker rubbers
• Rubber for dc-in lens
• Computer Aided Manufacturing (CAM) diffusion film
No No
Connector and cable guide
This section provides information for Lenovo authorized service technicians to help identify connectors and
cables for replacement purpose. To view each FRU and the exploded illustration of the computer, see “Major
FRUs” on page 52 and “LCD FRUs” on page 54.
Note: Depending on your model, some connectors or cables might not be available.
System board connectors and cables
1 2 3 4 5 6 7
8 9 10
15161718192021222324252627
11
28
12
13
14
56 ThinkPad P50 Hardware Maintenance Manual
29
30
32333435
31
36
Table 12. System board
N-
o.
Connector/feature Internal cable required Cable connection
1Embeded DisplayPort (eDP)
connector (internal)
LCD cable Connect one end to the LCD panel and the
other end to this connector.
2HDMI connector (external) No Connect a compatible digital audio device or
video monitor to this connector.
3Thunderbolt connector (external) No Connect a compatible device to this
connector.
4Ethernet connector (external) No Connect the computer to a LAN through this
connector.
5USB 3.0 connector (external) No Connect USB-compatible devices to this
connector.
6Always On USB 3.0 connector
(external)
No Connect USB-compatible devices to this
connector.
7Memory module slot (internal) No Insert the memory module into this slot.
8Camera cable connector (internal) LED camera cable The LCD comes with the LED camera cable.
Connect the LED camera cable to this
connector.
9Thermal fan assembly connector
(internal)
Thermal fan assembly
cable
The thermal fan assembly comes with cable.
Connect the cable to this connector.
10 Power button connector (internal) Power button card cable Connect the power button card cable to this
connector.
11 Mini DisplayPort connector
(external)
No Connect a compatible projector, external
monitor, or high-definition television to this
connector.
12 USB 3.0 connector (external) No Connect USB-compatible devices to this
connector.
13 USB 3.0 connector (external) No Connect USB-compatible devices to this
connector.
14 Audio connector (external) No Connect headphones or a headset with 3.5-
mm (0.14-inch) 4-pole plug to this connector.
15 Wireless-LAN card/WiGig slot
(internal)
No Insert the wireless-LAN/WiGig card into this
slot.
Chapter 7.Locations 57
Table 12. System board (continued)
N-
o.
Connector/feature Internal cable required Cable connection
16 Wireless-WAN card slot (internal) No Insert the wireless-WAN card into this slot.
17 Battery connector (internal) No Insert the battery directly to this connector.
18 Speaker connector (internal) Speaker assembly cable The speaker assembly comes with cable.
Connect the cable to this connector.
19 Fingerprint reader connector
(internal)
Fingerprint reader cable Connect one end to the fingerprint reader
card, and the other end to this connector.
20 Trackpad connector (internal) Trackpad cable Connect one end to the trackpad and the
other end to this connector.
21 Keyboard connector (internal) Keyboard cable The keyboard assembly comes with cable.
Connect one cable to this connector, and
connect the other cable to the TrackPoint
connector.
22 TrackPoint connector (internal) Keyboard cable The keyboard assembly comes with cable.
Connect one cable to this connector, and
connect the other cable to the keyboard
connector.
23 Solid-state drive slot (internal) No Insert the solid-state drive directly into this
slot.
24 Smart card connector (internal) Smart card cable The smart card comes with cable. Connect
the smart card cable to this connector.
25 Solid-state drive slot (internal) No Insert the solid-state drive directly into this
slot.
26 Color sensor connector (internal) Color sensor cable Connect one end to the color sensor card,
and the other end to this connector.
27 ExpressCard slot (external) No Insert an Expresscard into this slot.
28 Thermal fan assembly connector
(internal)
Thermal fan assembly
cable
The thermal fan assembly comes with cable.
Connect the cable to this connector.
29 Dock connector (internal) No Connect a supported docking station to your
computer through this connector.
30 dc-in connector (internal) dc-in connector cable Connect the c-in connector cable to this
connector.
31 Media card slot (external) No Insert a media card into this slot to read the
data on the card.
32 Coin-cell battery connector
(internal)
Coin-cell battery cable The coin-cell battery comes with cable.
Connect the cable to this connector.
33 HDD cable connector (internal) HDD cable Connect the HDD cable to this connector.
34 HDD cable connector (internal) HDD cable Connect the HDD cable to this connector.
35 Memory module slots (internal) No Insert the memory module into this slot.
36 Micro-SIM card slot (internal) No If the computer supports wireless WAN,
insert a micro SIM card into this slot to
establish wireless-WAN connections.
58 ThinkPad P50 Hardware Maintenance Manual
Keyboard bezel connector and cable
1
5 234
Table 13. Keyboard bezel connectors and cables
No. Connector/feature Internal cable required Cable connection
1Power button card Power button card cable Connect one end of the power button card
cable power button connector on the
system board, and the other end to this
connector.
2Color sensor card Color sensor cable Connect one end to the color sensor
connector on the system board, and the
other end to this connector.
3Click button connector Click button cable The click button comes with cable.
Connect the click button cable to this
connector.
4Trackpad cable connector Trackpad cable Connect one end to the trackpad
connector on the system board, and the
other end to this connector.
5Fingerprint reader connector Fingerprint reader cable Connect one end to the fingerprint reader
connector on the system board, and the
other end to this connector.
Looking up FRU information
For detailed FRU information, including part numbers, descriptions, and substitution part numbers, go to:
http://www.lenovo.com/serviceparts-lookup
Chapter 7.Locations 59
60 ThinkPad P50 Hardware Maintenance Manual
Chapter 8. FRU replacement notices
This chapter presents notices related to removing and replacing parts. Read this chapter carefully before
replacing any FRU.
CRU statement for customers:
You can resolve some problems with your product with a replacement part you can install yourself, called a
“Customer Replaceable Unit” or “CRU.” Some CRUs are designated as self-service CRUs and others are
designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For optional-
service CRUs, you can either install the CRU yourself or you can request that a Service Provider install the
CRU according to the warranty service for your product. If you intend on installing the CRU, Lenovo will ship
the CRU to you. CRU information and replacement instructions are shipped with your product and are
available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware
Maintenance Manual. An electronic version of this manual can be found at http://www.lenovo.com/
UserManuals. You might be required to return the defective part that is replaced by the CRU. When return is
required: (1) return instructions, a prepaid shipping label, and a container will be included with the
replacement CRU; and (2) you might be charged for the replacement CRU if Lenovo does not receive the
defective CRU within thirty (30) days of your receipt of the replacement CRU. See your Lenovo Limited
Warranty documentation for full details.
Screw notices
Loose screws can cause a reliability problem. In the ThinkPad notebook computer, this problem is
addressed with special nylon-coated screws that have the following characteristics:
• They maintain tight connections.
• They do not easily come loose, even with shock or vibration.
• They are harder to tighten.
Do the following when you service this machine:
• Keep the screw kit in your tool bag. For the part number of the screw kit, go to http://www.lenovo.com/
serviceparts-lookup.
• It is recommended to use new screws.
• It is recommended to use each screw only once.
Tighten screws as follows:
• Plastic to plastic
Turn an additional 90 degrees after the screw head touches the surface of the plastic part.
• Logic card to plastic
Turn an additional 180 degrees after the screw head touches the surface of the logic card.
© Copyright Lenovo 2015, 2019 61
Notes:
• Ensure that you use the correct screw. It is recommended to use new screws for replacements. If you
have a torque screwdriver, tighten all screws firmly to the torque specified in the screw information table
for each step.
• Ensure that torque screwdrivers are calibrated correctly following country specifications.
Retaining serial numbers
This section includes the following descriptions:
• “Restoring the serial number of the system unit” on page 62
• “Retaining the UUID” on page 63
Restoring the serial number of the system unit
When the computer was manufactured, the EEPROM on the system board was loaded with the serial
numbers of the system and all major components. These numbers need to remain the same throughout the
life of the computer.
If you replace the system board, you must restore the serial number of the system unit to its original value.
The serial number of the system unit is written on the label attached to the bottom of the computer.
If you can not find the serial number of the system unit on the bottom of the computer, try the following
method to get the number:
Note: Before you perform the operation, ensure that the UEFI/Legacy setting within the Startup menu in the
ThinkPad Setup program is set to UEFI Only.
1. Connect a USB memory key to the computer.
2. Go to http://www.lenovo.com/maintenanceutilities and follow the instructions on the screen to create a
Maintenance Key.
Note: Only an authorized Lenovo service technician can access the above Web site.
3. Restart the computer.
4. When the logo is displayed, press Esc. The ThinkPad Config Information Update Utility interface is
displayed.
5. Type 1 under Enter the action desired, then press Enter. The ThinkPad Serial Number Update Utility for
Asset ID screen is displayed.
6. Type 2 under Enter the action desired, then press Enter. The serial number of each device in your
computer is displayed; the serial number of the system unit is listed as follow:
20- Serial number
7. Record the serial number of the system unit.
After you replace the system board, do the following to restore the serial number of the system unit:
1. Connect the Maintenance Key to the computer.
62 ThinkPad P50 Hardware Maintenance Manual
2. When the logo is displayed, press Esc. The ThinkPad Config Information Update Utility interface is
displayed.
3. Type 1 under Enter the action desired, then press Enter. The ThinkPad Serial Number Update Utility for
Asset ID screen is displayed.
4. Type 1 under Enter the action desired, then press Enter. Then follow the instructions on the screen to
restore the serial number of the system unit.
Retaining the UUID
The Universally Unique Identifier (UUID) is a 128-bit number uniquely assigned to your computer at
production and stored in the EEPROM of your system board.
The algorithm that generates the number is designed to provide unique IDs until the year A.D. 3400. No two
computers in the world have the same number.
When you replace the system board, perform the following steps to create a new UUID for the system board
if the system board does not have a UUID:
Note: Before you perform the operation, ensure that the UEFI/Legacy setting within the Startup menu in the
ThinkPad Setup program is set to UEFI Only.
1. Connect a USB memory key to the computer.
2. Go to http://www.lenovo.com/maintenanceutilities and follow the instructions on the screen to create a
Maintenance Key.
Note: Only an authorized Lenovo service technician can access the above Web site.
3. Restart the computer.
4. When the logo screen is displayed, press Esc. The ThinkPad Config Information Update Utility interface
is displayed.
5. Type 2 under Enter the action desired, then press Enter. The Auto UUID generation utility interface is
displayed.
6. Type y under Change UUID. OK? [Y/N], then press Enter. A new UUID is created and written. If a valid
UUID already exists, it is not overwritten.
Reading or writing the ECA information
Information on Engineering Change Announcements (ECA) is stored in the EEPROM of the system board.
The electronic storage of this information simplifies the procedure to check if the ECA has been previously
applied to a machine. The machine does not need to be disassembled to check for the ECA application.
To check what ECAs have been previously applied to the machine, use the ECA Information Read/Write
function on the LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key.
1. Insert the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key, and
then restart the computer.
2. From the main menu, select 6. Set ECA Information.
3. To read the ECA information, select 2. Read ECA/rework number from EEPROM and follow the
instructions on the screen; To read box build date, select 5. Read box build date from EEPROM, and
follow the instructions on the screen.
After an ECA has been applied to the machine, the EEPROM must be updated to reflect the ECA's
application. Use the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance
Key to update the EEPROM.
Note: Only the ECA number is stored in the EEPROM. The machine type of the ECA is assumed to be the
same as the machine type of the machine that had the ECA applied to it.
Chapter 8.FRU replacement notices 63
1. Insert the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key, and
then restart the computer.
2. From the main menu, select 6. Set ECA Information.
3. To write the ECA information, select 1. Write ECA/rework number from EEPROM, and follow the
instruction; To write box build date, select 4. Write box build date from EEPROM, and follow the
instruction on the screen.
If the system board is being replaced, try to read the ECA information from the old system board and transfer
the information to the new system. If the system board is inoperable, this will not be possible.
64 ThinkPad P50 Hardware Maintenance Manual
Chapter 9. Removing or replacing a FRU
This chapter provides instructions on how to remove or replace a FRU.
CRU statement for customers:
You can resolve some problems with your product with a replacement part you can install yourself, called a
“Customer Replaceable Unit” or “CRU.” Some CRUs are designated as self-service CRUs and others are
designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For optional-
service CRUs, you can either install the CRU yourself or you can request that a Service Provider install the
CRU according to the warranty service for your product. If you intend on installing the CRU, Lenovo will ship
the CRU to you. CRU information and replacement instructions are shipped with your product and are
available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware
Maintenance Manual. An electronic version of this manual is available for downloading at http://
www.lenovo.com/UserManuals. You might be required to return the defective CRU. When return is required:
(1) return instructions, a prepaid shipping label, and a container will be included with the replacement CRU;
and (2) you might be charged for the replacement CRU if Lenovo does not receive the defective part within
thirty (30) days of your receipt of the replacement CRU. See your Lenovo Limited Warranty documentation
for full details.
General guidelines
When removing or replacing a FRU, be sure to observe the following general guidelines:
1. Do not try to service any computer unless you have been trained and certified. An untrained person runs
the risk of damaging parts.
2. Before replacing any FRU, review Chapter 8 “FRU replacement notices” on page 61.
3. Begin by removing any FRUs that have to be removed before replacing the failing FRU. Any such FRUs
are listed at the beginning of each FRU replacement section. Remove them in the order in which they are
listed.
4. Follow the correct sequence in the steps for removing a FRU, as given in the illustrations by the numbers
in square callouts.
5. When turning a screw, turn it in the direction as given by the arrow in the illustration.
6. When removing a FRU, move it in the direction as given by the arrow in the illustration.
7. To put the new FRU in place, reverse the removal procedure and follow any notes that pertain to
replacement.
8. When replacing a FRU, use the correct screws as shown in the replacement procedures.
DANGER
Before removing any FRU, turn off the computer, unplug all power cords from electrical outlets,
remove the battery pack, and then disconnect any interconnecting cables.
Attention:
• After replacing a FRU, do not turn on the computer until you have made sure that all screws, springs, and
other small parts are in place and none are loose inside the computer. Verify this by shaking the computer
gently and listening for rattling sounds. Metallic parts or metal flakes can cause electrical short circuits.
© Copyright Lenovo 2015, 2019 65
• The system board is sensitive to, and can be damaged by, electrostatic discharge (ESD). Before touching
it, establish personal grounding by touching a ground point with one hand or by using an electrostatic
discharge strap.
Common service tools
Below is the list of common service tools that you might need while servicing the computer.
• Torx #T8
• Flat-head screwdriver size #2.5mm
• Phillips screwdriver head size #0
• Phillips screwdriver head size #1
• Hex nut driver size #5mm
• Menda Nylon Probe #35622
Before servicing the computer
Carefully read this topic before servicing the computer.
Removing the micro SIM card
For access, remove this FRU:
• “1010 Battery” on page 67
If the computer has a micro SIM card installed, you must remove the micro SIM card before you start the
servicing.
1 2
After you finish the servicing, ensure that you install the micro SIM card back into the slot firmly.
Removing the dummy ExpressCard
For access, remove this FRU:
• “1010 Battery” on page 67
If the computer has a dummy ExpressCard installed, you must remove the dummy ExpressCard before you
start the servicing.
66 ThinkPad P50 Hardware Maintenance Manual
2
1
Removing a major FRU
This section provides instructions on how to remove a major FRU.
1010 Battery
Important notices for replacing a battery
Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out of their use.
The Lenovo Solution Center program provides an automatic battery diagnostic test that determines if the
battery pack is defective. A battery pack FRU should not be replaced unless this diagnostic test shows that
the battery is defective. The only exception to this is if the battery pack is physically damaged or a customer
is reporting a possible safety issue.
If the Lenovo Solution Center program is not installed on the computer, the customer should download and
install the program to diagnose the battery pack, before getting a non-physically damaged battery pack
replaced. Note that the replacement of a physically damaged battery pack is not covered by the warranty.
Removal steps of the battery
DANGER
Use only the authorized battery specified for your computer. Any other battery could ignite or
explode.
Chapter 9.Removing or replacing a FRU 67
1
2
1020 Bottom cover
For access, remove this FRU:
• “1010 Battery” on page 67
Removal steps of the large bottom door
Note: Loosen the screws 1.
2
1
1030 Storage drive
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
Attention:
68 ThinkPad P50 Hardware Maintenance Manual
• Do not drop the drive or apply any physical shock to it. The drive is sensitive to physical shock. Improper
handling can cause damage and permanent loss of data.
• Before removing the drive, have the user make a backup copy of all the information on it if possible.
• Never remove the drive while the system is operating or in suspend mode.
The computer has two hard disk drive slots (slot a and slot b). The hard disk drive slot b also can be used
as two M.2 solid-state drive slots (slot c and slot d).
ab d c
Mind the following guidelines before you replacing the storage drives:
• If the computer has only one hard disk drive, install the hard disk drive in the slot a.
• If the computer has only one M.2 solid-state drive, install the solid-state drive in the slot d.
• The M.2 solid-state drive slots support both SATA solid-state drive and Non-Volatile Memory Express
(NVMe) solid-state drive. If you install two M.2 solid-state drives, ensure that the two M.2 solid-state
drives are of the same type.
After replacing the storage drives, you might need to configure the storage drive boot order in the ThinkPad
Setup program. Ensure that you select the correct storage drive when you configure the settings.
Slot Slot label on the computer Corresponding menu selection in ThinkPad Setup
aATA hard disk drive0
bATA hard disk drive1
cATA hard disk drive3 or NVMe1
dATA hard disk drive2 or NVMe0
Chapter 9.Removing or replacing a FRU 69
Removal steps of the hard disk drive and hard disk drive cable
1
2
3
3
When installing the hard disk drive
Before you install the second hard disk drive into the hard disk drive slot , install two sponges first on the
bottom of the slot.
70 ThinkPad P50 Hardware Maintenance Manual
Removal steps of the M.2 solid-state drive and M.2 solid-state drive tray
1
2
Step Screw (quantity) Color Torque
1M2 × 3 mm, flat-head, nylon-coated (1) Black 0.181 Nm
(1.85 kgf-cm)
3
4
5
6
When installing the M.2 solid-state drive
Notes:
• The M.2 solid-state drive slots support both SATA solid-state drives and NVMe solid-state drives. NVMe
solid-state drives require a tray with an insulation pad a installed on the bottom. SATA solid-state drives
do not require a tray with an insulation pad. Ensure that you use the correct tray for each kind of solid-
state drive as shown in the following table.
72 ThinkPad P50 Hardware Maintenance Manual
Tray for NVMe solid-state drives Tray for SATA solid-state drives
• Ensure that you follow the identification mark on the tray to insert the M.2 solid-state drives.
• If you want to replace the hard disk drive with M.2 solid-state drive, ensure that you remove the sponges
from the hard disk drive slot first. Then, install the M.2 solid-state drive.
1040 Memory module under the bottom cover
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
Chapter 9.Removing or replacing a FRU 73
Removal steps of the memory module under the bottom cover
2
11
When installing:
• If you install only one memory module, install it into the bottom slot.
• Ensure that the memory module is firmly installed in the slot and does not move easily.
1050 Coin-cell battery
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
DANGER
Use only the authorized battery specified for your computer. Any other battery could ignite or
explode.
74 ThinkPad P50 Hardware Maintenance Manual
Removal steps of the coin-cell battery
1
2
When installing:
Ensure that the coin-cell battery connector is attached firmly.
1060 Keyboard
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
Removal steps of keyboard
Remove the screws that secure the keyboard.
1
1
1
Chapter 9.Removing or replacing a FRU 75
Step Screw (quantity) Color Torque
1M2 × 12 mm, flat-head, nylon-coated (3) Black 0.181 Nm
(1.85 kgf-cm)
Turn the computer over and open the display. Push hard in the direction shown by arrows 2 to unlatch the
keyboard. Then, the keyboard will open up slightly 3.
3
2
2
Pivot the keyboard slightly upward as shown by arrow 4 until you can see the connectors on the bottom side
of the keyboard. Then turn over the keyboard as shown by arrow 5.
4
5
Put the keyboard on the palm rest and detach the connectors. Then remove the keyboard.
76 ThinkPad P50 Hardware Maintenance Manual
6
78
9
Installation steps of keyboard
Attach the connectors and then turn over the keyboard.
1
2
3
4
5
Insert the keyboard into the keyboard bezel as shown. Ensure that the front edge of the keyboard (the edge
that is close to the computer display) is under the frame of the keyboard bezel.
Chapter 9.Removing or replacing a FRU 77
6
6
Slide the keyboard as shown by the arrows. Ensure that the latches are hidden under the keyboard bezel.
7
7
Turn the computer over. Reinstall the screws to secure the keyboard in place.
78 ThinkPad P50 Hardware Maintenance Manual
8
8
8
1070 Memory module bracket and memory module under the keyboard
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1060 Keyboard” on page 75
Removal steps of the memory module bracket and memory module under the keyboard
1
Step Screw (quantity) Color Torque
1M2 × 3 mm, flat-head, nylon-coated (1) Black 0.181 Nm
(1.85 kgf-cm)
Chapter 9.Removing or replacing a FRU 79
2
11
When installing:
• If you install only one memory module, install it into the bottom slot.
• Ensure that the memory module is firmly installed in the slot and does not move easily.
1080 Wireless LAN card
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1060 Keyboard” on page 75
Removal steps of the wireless LAN card
Remove the screw 1, and then detach the connectors 2.
1
2
80 ThinkPad P50 Hardware Maintenance Manual
Step Screw (quantity) Color Torque
1M2 × 3 mm, flat-head, nylon-coated (1) Black 0.181 Nm
(1.85 kgf-cm)
3
When installing:
Plug the gray cable into the connector labeled MAIN or 2 on the card; and plug the black cable into the
connector labeled AUX or 1 on the card.
1090 Wireless WAN card
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1060 Keyboard” on page 75
Removal steps of the wireless WAN card
Remove the screw 1, and then detach the connectors 2.
Chapter 9.Removing or replacing a FRU 81
2
21
Step Screw (quantity) Color Torque
2M2 × 3 mm, flat-head, nylon-coated (1) Black 0.181 Nm
(1.85 kgf-cm)
When installing:
Plug the orange cable into the connector labeled MAIN on the card; and plug the blue cable into the
connector labeled AUX on the card.
3
82 ThinkPad P50 Hardware Maintenance Manual
1100 Keyboard bezel assembly
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1030 Storage drive” on page 68
• “1060 Keyboard” on page 75
Important:
Read the following instructions first before replacing the keyboard bezel assembly for the computer models
with a color sensor.
• If the hard disk drive or solid-state drive is not defective, and only the keyboard bezel assembly needs a
replacement:
1. Replace the keyboard bezel assembly.
2. After you replace the keyboard bezel assembly, start the computer and run the Sensor Replacement Utility
program by clicking Start ➙ All Programs ➙ X-Rite ➙ Sensor Replacement Utility.
3. If you do not have access to the hard disk drive or solid-state drive, provide the customer with information on
how to run the Sensor Replacement Utility.
• If both the hard disk drive or solid-state drive and the keyboard bezel assembly need replacements:
1. Before you replace the keyboard bezel assembly, back up the color sensor calibration profile ECCM2SensorData.
dat to an external device. This calibration profile is generated after you use the color sensor for the first time. To
locate the DAT file, do the following:
– For Windows 7: Go to C:\ProgramData\X-Rite\ECCM-2.
– For Windows 10: Click This PC ➙ Documents ➙ X-Rite.
2. If you are unable to back up the color sensor calibration profile, and if no problem was reported with the color
sensor, follow the steps at the end of this topic to remove the color sensor from the original keyboard bezel
assembly, and install the color sensor to the new keyboard bezel assembly.
3. Replace the hard disk drive. See “1030 Storage drive” on page 68. Then reload the operating system.
4. If the Sensor Replacement Utility program cannot be launched successfully, restore the backed up color
sensor calibration profile ECCM2SensorData.dat to the following places:
– For Windows 7: Go to C:\ProgramData\X-Rite\ECCM-2.
– For Windows 10: Click This PC ➙ Documents ➙ X-Rite.
5. If you did not back up the calibration profile and the customer does not have a backup of their image, you
will also need to replace the LCD panel even if the LCD panel is not broken. See “2030 LCD panel, hinge
assembly, and LCD cable” on page 102.
6. Run the Sensor Replacement Utility program again and follow the instructions on the screen to perform the
initial color calibration, or provide instructions to the customer to run this utility.
7. When the initial calibration completes, a dialog box is displayed. Click OK to exit the Sensor Replacement
Utility program.
Chapter 9.Removing or replacing a FRU 83
Removal steps of the keyboard bezel assembly
1
2
1
1
2
12
1
Step Screw (quantity) Color Torque
1M2.5 × 4 mm, flat-head, nylon-coated (5) Silver 0.294 Nm
(3.0 kgf-cm)
2M2.5 × 5 mm, flat-head, nylon-coated (3) Black 0.294 Nm
(3.0 kgf-cm)
54
6
7
3
8
When installing:
Ensure that the connectors are attached firmly.
84 ThinkPad P50 Hardware Maintenance Manual
13
14b 14a
When installing:
Ensure that all the latches are well assembled and there is no abnormal gap.
1110 Color sensor assembly, fingerprint reader cable, and trackpad
cable
For access, remove these FRUs in order:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1030 Storage drive” on page 68
• “1060 Keyboard” on page 75
• “1100 Keyboard bezel assembly” on page 83
Removal steps of the color sensor assembly
2
1
When installing:
Ensure that the connector is attached firmly.
86 ThinkPad P50 Hardware Maintenance Manual
Removal steps of the fingerprint reader cable
11
1
2
When installing:
Ensure that the connector is attached firmly.
Removal steps of the trackpad cable
11
2
1
2
When installing:
Ensure that the connector is attached firmly.
1120 Hinge caps
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1030 Storage drive” on page 68
• “1060 Keyboard” on page 75
• “1100 Keyboard bezel assembly” on page 83
Chapter 9.Removing or replacing a FRU 87
Removal steps of the hinge caps
1
1
Step Screw (quantity) Color Torque
1M2 × 3 mm, flat-head, nylon-coated (2) Black 0.181 Nm
(1.85 kgf-cm)
When installing:
Open the LCD to 180 degrees from the relative position of the keyboard.
1130 LCD unit
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1030 Storage drive” on page 68
• “1060 Keyboard” on page 75
• “1080 Wireless LAN card” on page 80
• “1090 Wireless WAN card ” on page 81
• “1100 Keyboard bezel assembly” on page 83
• “1120 Hinge caps” on page 87
Removal steps of the LCD unit
2
1
1
2
3
3
88 ThinkPad P50 Hardware Maintenance Manual
Step Screw (quantity) Color Torque
1M2.5 × 8 mm, flat-head, nylon-coated (2) Black 0.294 Nm
(3.0 kgf-cm)
2 3 M2.5 × 5 mm, flat-head, nylon-coated (2) Black 0.294 Nm
(3.0 kgf-cm)
4
4
Step Screw (quantity) Color Torque
4M2.5 × 5 mm, flat-head, nylon-coated (2) Silver 0.294 Nm
(3.0 kgf-cm)
5
6
When installing:
Ensure that the connectors are attached firmly.
Chapter 9.Removing or replacing a FRU 89
7
7
When installing:
Ensure that you route the cables firmly and tape up in the proper positions.
Attention: When you route the cables, ensure that they are not subject to any tension. Tension could cause
the cables to be damaged by the cable guides, or a wire to be broken.
1140 Chassis assembly
For access, remove these FRUs in order:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1030 Storage drive” on page 68
• “1060 Keyboard” on page 75
• “1100 Keyboard bezel assembly” on page 83
• “1120 Hinge caps” on page 87
• “1130 LCD unit” on page 88
90 ThinkPad P50 Hardware Maintenance Manual
Removal steps of the chassis assembly
1
12
Step Screw (quantity) Color Torque
1M2.5 × 5 mm, flat-head, nylon-coated (2) Black 0.181 Nm
(1.85 kgf-cm)
2M2 × 12 mm, flat-head, nylon-coated (1) Black 0.181 Nm
(1.85 kgf-cm)
3
3
Step Screw (quantity) Color Torque
3M2 × 12 mm, flat-head, nylon-coated (2) Black 0.181 Nm
(1.85 kgf-cm)
Chapter 9.Removing or replacing a FRU 91
4
5
6
1150 Smart card reader, smart card reader cable, or dummy smart card
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1030 Storage drive” on page 68
• “1060 Keyboard” on page 75
• “1100 Keyboard bezel assembly” on page 83
• “1120 Hinge caps” on page 87
• “1130 LCD unit” on page 88
• “1140 Chassis assembly ” on page 90
92 ThinkPad P50 Hardware Maintenance Manual
Removal steps of the smart card reader and smart card reader cable
11
1
2
When installing:
Ensure that the connector is attached firmly.
3
3
4
Step Screw (quantity) Color Torque
3M2 × 3 mm, flat-head, nylon-coated (2) Black 0.181 Nm
(1.85 kgf-cm)
Removal steps of the dummy smart card reader
If the computer you are servicing has a dummy smart card reader installed. Follow the following instructions
to remove or replace the dummy smart card reader.
Chapter 9.Removing or replacing a FRU 93
1
1
2
Step Screw (quantity) Color Torque
1M2 × 3 mm, flat-head, nylon-coated (2) Black 0.181 Nm
(1.85 kgf-cm)
1160 Speaker assembly and speaker rubber
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1030 Storage drive” on page 68
• “1060 Keyboard” on page 75
• “1100 Keyboard bezel assembly” on page 83
• “1120 Hinge caps” on page 87
• “1130 LCD unit” on page 88
• “1140 Chassis assembly ” on page 90
Removal steps of the speaker assembly and speaker rubber
1
1
Step Screw (quantity) Color Torque
1M2 × 2.2 mm +2.3L, flat-head, nylon-coated (2) Silver 0.181 Nm
(1.85 kgf-cm)
94 ThinkPad P50 Hardware Maintenance Manual
2
2
2
3
When installing:
Ensure that the rubbers for the speaker assembly are installed.
1170 Thermal fan assembly
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1030 Storage drive” on page 68
• “1060 Keyboard” on page 75
• “1100 Keyboard bezel assembly” on page 83
• “1120 Hinge caps” on page 87
• “1130 LCD unit” on page 88
• “1140 Chassis assembly ” on page 90
Removal steps of the thermal fan assembly
Detach the thermal fan assembly connector 1.
1
1
Loosen the screws 2 in ascending alphabetical order (2a to 2h) as illustrated, and then remove the thermal
fan assembly 3.
Chapter 9.Removing or replacing a FRU 95
2a
2e
2c
2h
2b
2g
2d
2f
3
3
When installing:
• Do not touch the areas marked a and b in the following illustrations.
b
a
a b
• Ensure that the fan connector is attached firmly.
• Each screw is marked with a number on the thermal fan assembly. When installing, follow the screw
number to tighten the screws in ascending numerical order; otherwise, the system board assembly might
be damaged.
• If you want to re-use the old thermal fan assembly, remove the thermal grease first, and then apply new
thermal grease to the thermal fan assembly, at an amount of 0.2 grams, before you attach it to the system
board. Either too much or too less application of grease can cause a thermal problem due to imperfect
contact with a component.
1180 System board
Important notices for handling the system board
When handling the system board, read the following:
• The system board has an accelerometer, which can be broken when several thousands of G-forces are
applied.
Note: Dropping a system board from a height of as little as 6 inches so that it falls flat on a hard bench
can subject the accelerometer to as much as 6000 G's of shock.
• Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or
composite.
96 ThinkPad P50 Hardware Maintenance Manual
• Avoid rough handling of any kind.
• At every point in the process, be sure not to drop or stack the system board.
• If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or a
corrugated conductive material.
For access, remove these FRUs in order:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1030 Storage drive” on page 68
• “1060 Keyboard” on page 75
• “1080 Wireless LAN card” on page 80
• “1090 Wireless WAN card ” on page 81
• “1100 Keyboard bezel assembly” on page 83
• “1120 Hinge caps” on page 87
• “1130 LCD unit” on page 88
• “1140 Chassis assembly ” on page 90
The following components soldered on the top side of the system board is extremely sensitive. When you
service the system board, avoid any kind of rough handling.
a Graphic Processing Unit (GPU)
b Central Processing Unit (CPU)
c Platform Controller Hub (PCH)
d Accelerometer chip for the hard disk drive Active Protection System® (APS)
a
b
c
d
Chapter 9.Removing or replacing a FRU 97
Removal steps of the system board
1
When installing:
Ensure that the connector is attached firmly.
23
Step Screw (quantity) Color Torque
2M2 × 3 mm, flat-head, nylon-coated (1) Black 0.181 Nm
(1.85 kgf-cm)
When installing:
Ensure to reinstall the rubber as shown.
98 ThinkPad P50 Hardware Maintenance Manual
1190 Base cover assembly
For access, remove these FRUs in order:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1030 Storage drive” on page 68
• “1060 Keyboard” on page 75
• “1080 Wireless LAN card” on page 80
• “1090 Wireless WAN card ” on page 81
• “1100 Keyboard bezel assembly” on page 83
• “1120 Hinge caps” on page 87
• “1130 LCD unit” on page 88
• “1140 Chassis assembly ” on page 90
• “1170 Thermal fan assembly” on page 95
• “1180 System board” on page 96
Applying labels to the base cover:
The new base cover FRU is shipped with a kit containing labels of several kinds. Apply those labels when you
replace the base cover. For the labels that are not shipped with the new base cover, peel them from the old
base cover, and adhere them to the new one.
The following illustration shows the location of each label.
Chapter 9.Removing or replacing a FRU 99
21 3 4
1620 171819
5
6
21
8
25
22
23
243
7
8
9
11
10
13
14
15
12
1 Information label 2 Wireless label for special-bid products
3 Asset tag label 4 ICASA label
5 Israel label (WLAN/Bluetooth/3G) 6 Brazil Anatel label (WLAN/Bluetooth/3G)
7 Malaysia SIRIM label (WLAN/Bluetooth/3G) 8 CECP label
9 China GEO label 10 China WWAN/modem label
11 Indonesia rating label 12 Indonesia POSTEL label
13 Swiss SIM ICCID label 14 KC safety label for Korea
15 CNC label 16 BIS label
17 System label 18 IMEI label
19 Certificate of Authenticity (COA) label 20 Malaysia SIRIM label
21 GEO label 22 FCC-WLAN label
23 GEO label for Taiwan WWAN 24 S/N label
25 Genuine Microsoft label (GML)
Removing an LCD FRU for non-touch models
This section provides instructions on how to remove an LCD FRU for models without touch feature.
2010 LCD bezel assembly
For access, remove this FRU:
• “1010 Battery” on page 67
100 ThinkPad P50 Hardware Maintenance Manual
Removal steps of the LCD bezel assembly
1
1
1
1
1
1
1
1
1
1
2
When installing:
Ensure that all the latches are attached firmly.
2020 Bezel support rubber
If your computer model does not have a camera, there might be a bezel support rubber attached.
For access, remove these FRUs in order:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1130 LCD unit” on page 88
• “2010 LCD bezel assembly” on page 100
Removal steps of the bezel support rubber
Chapter 9.Removing or replacing a FRU 101
2030 LCD panel, hinge assembly, and LCD cable
For access, remove these FRUs in order:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1130 LCD unit” on page 88
• “2010 LCD bezel assembly” on page 100
Read this first before replacing the LCD panel for models with a color sensor
Important:
If your LCD panel needs a replacement, order a special LCD panel FRU kit for color sensor model from Lenovo.
The FRU kit contains a LCD panel, a USB key/disc, and an instruction flyer. For the correct FRU kit part
number, check on the Web site at http://www.lenovo.com/serviceparts-lookup.
To replace the LCD panel, be sure to follow these steps:
1. Before you replace the LCD panel, locate the label on the plastic jacket of the new LCD panel. Locate
the numeric key number on the label and record it.
2. Replace the failing LCD panel with the new one that was shipped to you.
3. Start the computer and enter the Windows operating environment.
4. Insert the disc or USB key that came with the new LCD panel. If the autorun function is enabled, the
Panel Replacement Utility program starts automatically. If the program does not start automatically, run
the program manually by exploring the disc or USB key and double-clicking PanelReplacementUtility.
exe.
5. Follow the instructions on the screen to perform the initial color calibration. When the key number is
required, type the number that you recorded in step 1. Then the Panel Replacement Utility program
starts to measure the new LCD panel and perform the initial color calibration.
6. When the initial calibration is finished, a dialog box is displayed. Click OK to exit the Panel Replacement
Utility program.
Important: If the computer is protected by a hard disk password or a Windows password, do one of the
following:
• Ask the customer for the password to run the Panel Replacement Utility program.
• Provide the disc/USB key and the numeric key number to the customer and guide the customer to run the
Panel Replacement Utility program.
Failing to run the Panel Replacement Utility program will require another LCD panel replacement.
102 ThinkPad P50 Hardware Maintenance Manual
2
3
2
2
2
2
3
3
3
2
Step Screw (quantity) Color Torque
2M2.5 × 4 mm, flat-head, nylon-coated (6) Silver 0.181 Nm
(1.85 kgf-cm))
3M2 × 3 mm, flat-head, nylon-coated (4) Silver 0.181 Nm
(1.85 kgf-cm))
Removal steps of the LCD cable
3
2
1
When installing:
Ensure that the LCD connector is attached firmly.
2040 LED camera cable assembly
For access, remove these FRUs:
104 ThinkPad P50 Hardware Maintenance Manual
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1130 LCD unit” on page 88
• “2010 LCD bezel assembly” on page 100
• “2030 LCD panel, hinge assembly, and LCD cable” on page 102
Removal steps of the LED camera cable assembly
3
11
1
2
4
When installing:
Ensure that the connectors are attached firmly.
Chapter 9.Removing or replacing a FRU 105
555
5
2050 Antenna kit and LCD rear cover assembly
For access, remove these FRUs in order:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1130 LCD unit” on page 88
• “2010 LCD bezel assembly” on page 100
• “2030 LCD panel, hinge assembly, and LCD cable” on page 102
• “2040 LED camera cable assembly” on page 104
Removal steps of the antenna kit and LCD rear cover assembly
1111
106 ThinkPad P50 Hardware Maintenance Manual
22
2
2
Cable routing:
When you install the antenna kit, route the cables as shown in the following illustration.
ba c d
a Wireless LAN auxiliary antenna (black)
b Wireless WAN auxiliary antenna (blue)
c Wireless WAN main antenna (orange)
d Wireless LAN main antenna (grey)
Attention: As you route the cables, ensure that they are not subject to any tension. Tension could cause the
cables to be damaged by the cable guides, or a wire to be broken.
Removing an LCD FRU for touch models
This section provides instructions on how to remove an LCD FRU for models with touch feature.
Chapter 9.Removing or replacing a FRU 107
2010 LCD strip bezel
For access, remove this FRU:
• “1010 Battery” on page 67
Removal steps of the LCD strip bezel
When installing:
Ensure that all the latches are attached firmly.
2020 LCD panel assembly, hinge assembly, and LCD cable
For access, remove these FRUs in order:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1130 LCD unit” on page 88
• “s” on page 100
Read this first before replacing the LCD panel for models with a color sensor
Important:
If your LCD panel needs a replacement, order a special LCD panel FRU kit for color sensor model from Lenovo.
The FRU kit contains a LCD panel, a USB key/disc, and an instruction flyer. For the correct FRU kit part
number, check on the Web site at http://www.lenovo.com/serviceparts-lookup.
To replace the LCD panel, be sure to follow these steps:
1. Before you replace the LCD panel, locate the label on the plastic jacket of the new LCD panel. Locate
the numeric key number on the label and record it.
2. Replace the failing LCD panel with the new one that was shipped to you.
3. Start the computer and enter the Windows operating environment.
4. Insert the disc or USB key that came with the new LCD panel. If the autorun function is enabled, the
Panel Replacement Utility program starts automatically. If the program does not start automatically, run
the program manually by exploring the disc or USB key and double-clicking PanelReplacementUtility.
exe.
5. Follow the instructions on the screen to perform the initial color calibration. When the key number is
required, type the number that you recorded in step 1. Then the Panel Replacement Utility program
starts to measure the new LCD panel and perform the initial color calibration.
6. When the initial calibration is finished, a dialog box is displayed. Click OK to exit the Panel Replacement
Utility program.
108 ThinkPad P50 Hardware Maintenance Manual
Important: If the computer is protected by a hard disk password or a Windows password, do one of the
following:
• Ask the customer for the password to run the Panel Replacement Utility program.
• Provide the disc/USB key and the numeric key number to the customer and guide the customer to run the
Panel Replacement Utility program.
Failing to run the Panel Replacement Utility program will require another LCD panel replacement.
Removal steps of the LCD panel assembly
1
1
25
4
3
Step Screw (quantity) Color Torque
1M2.5 × 4 mm, flat-head, nylon-coated (2) Silver 0.181 Nm
(1.85 kgf-cm)
7
66
6
6
6
6
6
6
6
6
6
6
6
6
When installing:
Chapter 9.Removing or replacing a FRU 109
Ensure that the LCD connector is attached firmly.
Removal steps of the hinge assembly
1
1
1
1
1
1
1
1
1
1
2
3
2
2
3
2
Step Screw (quantity) Color Torque
2M2.5 × 4 mm, flat-head, nylon-coated (4) Silver 0.181 Nm
(1.85 kgf-cm)
3M2 × 3 mm, flat-head, nylon-coated (2) Silver 0.181 Nm
(1.85 kgf-cm)
110 ThinkPad P50 Hardware Maintenance Manual
Removal steps of the LCD cable
3
2
1
2030 LED camera cable assembly
For access, remove these FRUs:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1130 LCD unit” on page 88
• “2010 LCD bezel assembly” on page 100
• “2030 LCD panel, hinge assembly, and LCD cable” on page 102
Removal steps of the LED camera cable assembly
3
5
11
1
2
4
Chapter 9.Removing or replacing a FRU 111
6
When installing:
Ensure that the connectors are attached firmly.
777
7
2040 Antenna kit and LCD rear cover assembly
For access, remove these FRUs in order:
• “1010 Battery” on page 67
• “1020 Bottom cover” on page 68
• “1130 LCD unit” on page 88
• “2010 LCD bezel assembly” on page 100
• “2030 LCD panel, hinge assembly, and LCD cable” on page 102
• “2040 LED camera cable assembly” on page 104
112 ThinkPad P50 Hardware Maintenance Manual
ba c d
a Wireless LAN auxiliary antenna (black)
b Wireless WAN auxiliary antenna (blue)
c Wireless WAN main antenna (orange)
d Wireless LAN main antenna (grey)
Attention: As you route the cables, ensure that they are not subject to any tension. Tension could cause the
cables to be damaged by the cable guides, or a wire to be broken.
114 ThinkPad P50 Hardware Maintenance Manual
Appendix A. Notices
Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult
your local Lenovo representative for information on the products and services currently available in your
area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that
Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service
that does not infringe any Lenovo intellectual property right may be used instead. However, it is the user’s
responsibility to evaluate and verify the operation of any other product, program, or service.
Lenovo may have patents or pending patent applications covering subject matter described in this
document. The furnishing of this document does not give you any license to these patents. You can send
license inquiries, in writing, to:
Lenovo (United States), Inc.
1009 Think Place - Building One
Morrisville, NC 27560
U.S.A.
Attention: Lenovo Director of Licensing
LENOVO PROVIDES THIS PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT,
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some jurisdictions do not allow
disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply to
you.
This information could include technical inaccuracies or typographical errors. Changes are periodically made
to the information herein; these changes will be incorporated in new editions of the publication. Lenovo may
make improvements and/or changes in the product(s) and/or the program(s) described in this publication at
any time without notice.
The products described in this document are not intended for use in implantation or other life support
applications where malfunction may result in injury or death to persons. The information contained in this
document does not affect or change Lenovo product specifications or warranties. Nothing in this document
shall operate as an express or implied license or indemnity under the intellectual property rights of Lenovo or
third parties. All information contained in this document was obtained in specific environments and is
presented as an illustration. The result obtained in other operating environments may vary.
Lenovo may use or distribute any of the information you supply in any way it believes appropriate without
incurring any obligation to you.
Any references in this publication to non-Lenovo Web sites are provided for convenience only and do not in
any manner serve as an endorsement of those Web sites. The materials at those Web sites are not part of the
materials for this Lenovo product, and use of those Web sites is at your own risk.
Any performance data contained herein was determined in a controlled environment. Therefore, the result
obtained in other operating environments may vary significantly. Some measurements may have been made
on development-level systems and there is no guarantee that these measurements will be the same on
generally available systems. Furthermore, some measurements may have been estimated through
extrapolation. Actual results may vary. Users of this document should verify the applicable data for their
specific environment.
© Copyright Lenovo 2015, 2019 115
Electronic emissions notices
For electronic emission information on Class B digital devices, refer to the corresponding information in the
User Guide.
EU contact: Lenovo, Einsteinova 21, 851 01 Bratislava, Slovakia
Trademarks
The following terms are trademarks of Lenovo in the United States, other countries or both:
Lenovo
ThinkPad
TrackPoint
Microsoft, Windows, Windows Server, and Cortana are trademarks of the Microsoft group of companies.
Other company, product, or service names may be the trademarks or service marks of others.
116 ThinkPad P50 Hardware Maintenance Manual
Appendix B. Abbreviation table
The following table lists all abbreviations used in this manual.
Abbreviation Term
BGA Ball Grid Array
CMOS Complementary Metal Oxide Semiconductor
CMV Custom Model Variant
CRC Cyclic redundancy check
CRT Cathode ray tube
CRU Customer Replaceable Unit
CTO Configure To Order
EAIA Enhanced Asset Information Area
EEPROM Electrically Erasable Programmable Read-Only Memory
EFI Extensible Firmware Interface
ESD Electrostatic discharge
FRU Field Replaceable Unit
GAV General Announce Variant
IC Integrated circuits
LCD Liquid Crystal Display
MTM Machine type and model
POST Power-on self-test
RFID Radio-frequency identification
SVP Supervisor password
UUID Universally unique identifier
© Copyright Lenovo 2015, 2019 117
118 ThinkPad P50 Hardware Maintenance Manual
Part Number: SP40J71944_04
Printed in China
(1P) P/N: SP40J71944_04
*1PSP40J71944_04*