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. Using the 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
- Disabling the built-in battery
- Removing a major FRU
- 1010 Bottom cover
- 1020 Battery
- 1030 Storage drive
- 1040 Memory module under the bottom cover
- 1050 Keyboard
- 1060 Coin-cell battery
- 1070 Memory module bracket and memory module under the keyboard
- 1080 Wireless LAN card
- 1090 Keyboard bezel assembly
- 1110 NFC card, fingerprint reader card, trackpad cable, trackpad button board, and power button board
- 1120 Speaker assembly
- 1130 Hinge caps and LCD unit
- 1140 Chassis assembly
- 1150 Left I/O board, Left I/O board cable, and right I/O board
- 1160 Smart card reader, smart card reader cable, or dummy smart card
- 1170 Thermal fan assembly
- 1180 System board, dc-in bracket, dc-in cable assembly, and base cover assembly
- Removing an LCD FRU
- Appendix A. Notices
Lenovo FRU01YP792 User Manual
Displayed below is the user manual for FRU01YP792 by Lenovo which is a product in the Notebook Spare Parts category. This manual has pages.
Related Manuals
ThinkPad P72
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 107.
First Edition (August 2018)
© Copyright Lenovo 2018.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to 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
Diagnosing problems . . . . . . . . . . . 26
Quick test programs . . . . . . . . . . . 27
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 . . . . . . . 30
Chapter 4. Related service
information . . . . . . . . . . . . . . . 31
Recovery overview for the Windows 10 operating
system . . . . . . . . . . . . . . . . . . 31
Resetting your computer . . . . . . . . . 31
Using advanced startup options . . . . . . 31
Recovering your operating system if Windows
10 fails to start . . . . . . . . . . . . . 32
Creating and using a recovery USB drive . . . 32
Passwords. . . . . . . . . . . . . . . . . 32
Power-on password . . . . . . . . . . . 33
Hard disk password . . . . . . . . . . . 33
Supervisor password . . . . . . . . . . . 33
How to remove the power-on password . . . 33
How to remove the hard disk password. . . . 34
Power management . . . . . . . . . . . . . 34
Sleep mode . . . . . . . . . . . . . . 35
Hibernation mode . . . . . . . . . . . . 35
Symptom-to-FRU index . . . . . . . . . . . 35
Numeric error codes . . . . . . . . . . . 36
Error messages . . . . . . . . . . . . . 37
Beep errors. . . . . . . . . . . . . . . 38
No-beep symptoms . . . . . . . . . . . 39
LCD-related symptoms . . . . . . . . . . 39
Intermittent problems . . . . . . . . . . . 40
Undetermined problems . . . . . . . . . 40
Chapter 5. Configuring RAID . . . . . 43
Storage drive requirements for RAID levels . . . . 43
Configuring RAID with the Intel RST configuration
utility . . . . . . . . . . . . . . . . . . . 43
Entering the Intel RST configuration utility . . . 44
Creating RAID volumes . . . . . . . . . . 44
Deleting RAID volumes . . . . . . . . . . 45
Resetting storage drives to non-RAID . . . . 45
Rebuilding RAID 1 volumes . . . . . . . . 46
Chapter 6. Using the special keys. . . 47
Chapter 7. Locations . . . . . . . . . 49
Locating computer controls, connectors, and
indicators . . . . . . . . . . . . . . . . . 49
Front view . . . . . . . . . . . . . . . 49
Side views . . . . . . . . . . . . . . . 50
Rear view . . . . . . . . . . . . . . . 50
Bottom view . . . . . . . . . . . . . . 51
Status indicators . . . . . . . . . . . . 51
Locating FRUs and CRUs . . . . . . . . . . . 53
Major FRUs . . . . . . . . . . . . . . 55
LCD FRUs . . . . . . . . . . . . . . . 57
Miscellaneous parts . . . . . . . . . . . 58
Connector and cable guide . . . . . . . . 58
Looking up FRU information . . . . . . . . . . 64
Chapter 8. FRU replacement
notices . . . . . . . . . . . . . . . . . 65
Screw notices . . . . . . . . . . . . . . . 65
Retaining serial numbers . . . . . . . . . . . 66
Restoring the serial number of the system
unit . . . . . . . . . . . . . . . . . . 66
© Copyright Lenovo 2018 i
Retaining the UUID. . . . . . . . . . . . 67
Reading or writing the ECA information . . . . 67
Chapter 9. Removing or replacing a
FRU. . . . . . . . . . . . . . . . . . . 69
General guidelines. . . . . . . . . . . . . . 69
Common service tools . . . . . . . . . . . . 70
Before servicing the computer . . . . . . . . . 70
Disabling the built-in battery . . . . . . . . . . 70
Removing a major FRU . . . . . . . . . . . . 70
1010 Bottom cover. . . . . . . . . . . . 70
1020 Battery . . . . . . . . . . . . . . 71
1030 Storage drive . . . . . . . . . . . . 72
1040 Memory module under the bottom
cover . . . . . . . . . . . . . . . . . 73
1050 Keyboard . . . . . . . . . . . . . 74
1060 Coin-cell battery . . . . . . . . . . 77
1070 Memory module bracket and memory
module under the keyboard . . . . . . . . 78
1080 Wireless LAN card . . . . . . . . . . 79
1090 Keyboard bezel assembly . . . . . . . 80
1110 NFC card, fingerprint reader card,
trackpad cable, trackpad button board, and
power button board . . . . . . . . . . . 81
1120 Speaker assembly. . . . . . . . . . 86
1130 Hinge caps and LCD unit . . . . . . . 87
1140 Chassis assembly . . . . . . . . . . 90
1150 Left I/O board, Left I/O board cable, and
right I/O board . . . . . . . . . . . . . 91
1160 Smart card reader, smart card reader
cable, or dummy smart card . . . . . . . . 93
1170 Thermal fan assembly . . . . . . . . 94
1180 System board, dc-in bracket, dc-in
cable assembly, and base cover assembly . . 95
Removing an LCD FRU . . . . . . . . . . . . 98
2010 LCD strip cover and LCD bezel
assembly . . . . . . . . . . . . . . . 98
2020 LED card . . . . . . . . . . . . . 99
2030 LCD panel, LCD cable, and hinge
assembly . . . . . . . . . . . . . . . 100
2040 Camera card and LED/camera cable
assembly . . . . . . . . . . . . . . . 102
2050 Wireless LAN antenna kit and LCD rear
cover assembly . . . . . . . . . . . . . 103
Appendix A. Notices . . . . . . . . . . 107
Electronic emissions notices . . . . . . . . . . 108
Trademarks . . . . . . . . . . . . . . . . 108
ii ThinkPad P72 Hardware Maintenance Manual
About this manual
This manual contains service and reference information for the following ThinkPad® products.
ThinkPad P72 Machine Types (MT) 20MB and 20MC
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 2018 iii
iv ThinkPad P72 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 2018 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 P72 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: https://
support.lenovo.com/partslookup
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 P72 Hardware Maintenance Manual
6ThinkPad P72 Hardware Maintenance Manual
PERIGO
PERIGO
PERIGO
PERIGO
PERIGO
8ThinkPad P72 Hardware Maintenance Manual
DANGER
DANGER
DANGER
DANGER
VORSICHT
10 ThinkPad P72 Hardware Maintenance Manual
VORSICHT
VORSICHT
VORSICHT
12 ThinkPad P72 Hardware Maintenance Manual
14 ThinkPad P72 Hardware Maintenance Manual
16 ThinkPad P72 Hardware Maintenance Manual
18 ThinkPad P72 Hardware Maintenance Manual
20 ThinkPad P72 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: https://pcsupport.lenovo.com/supportphonelist
• System Disassembly/Reassembly videos that show the FRU removals or replacements for the Lenovo
authorized service technicians are available in the following support site:
https://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 https://support.lenovo.com 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 2018 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 FRUs for a product, do the following:
1. Go to:
https://support.lenovo.com/partslookup
22 ThinkPad P72 Hardware Maintenance Manual
24 ThinkPad P72 Hardware Maintenance Manual
Chapter 3. General checkout
This chapter introduces following information:
• “What to do first” on page 25
• “Checkout guide” on page 26
– “Diagnosing problems” on page 26
– “Quick test programs” on page 27
– “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: https://
support.lenovo.com/partslookup
• 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 2018 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 personal-computer card (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.
Diagnosing problems
Many computer problems can be solved without outside assistance. If you experience a problem with your
computer, the first place to start is the troubleshooting information in your computer documentation. If you
suspect a software problem, see the documentation, including readme files and help information systems,
that come with the operating system or program. ThinkPad notebook computers come with a set of
diagnostic programs that you can use to help you identify hardware problems.
Diagnosing problems with Lenovo Vantage on the Windows 10 operating system
Note: If you are unable to isolate and repair the problem yourself after running Lenovo Vantage, save and
print the log files created by the program. You need the log files when you speak to a Lenovo technical
support representative.
Lenovo Vantage supports the hardware scan function. It combines diagnostic tests, system information
collection, security status, and support information, along with hints and tips for optimal system
performance.
The troubleshooting information or the diagnostic programs might tell you that you need additional or
updated device drivers or other software. You can get the latest technical information and download device
drivers and updates from the Lenovo Support Web site at:
26 ThinkPad P72 Hardware Maintenance Manual
https://support.lenovo.com
For additional information, see the Lenovo Vantage help system.
Quick test programs
Lenovo provides quick test programs to troubleshoot and resolve computer problems.
To download and install a quick test program, go to https://www.lenovo.com/diags, and follow the instructions
on the Web site.
To run a test using quick test program, do the following:
1. Go to the C:\SWTOOLS\ldiag directory.
2. Double-click the 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 35
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 https://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:
Chapter 3.General checkout 27
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 35 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:
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 35 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 pack or an ac power adapter is functional, do the following:
1. Turn off the computer.
2. Connect the ac power adapter.
3. Turn on the computer. If the computer can be turned on, it means that either the battery pack or the ac
power adapter is functional.
4. Insert a straightened paper clip into the emergency reset hole to reset the computer. If the computer is
still powered on, it means that the ac power adapter is functional.
5. Turn off the computer.
6. Disconnect the ac power adapter and turn on the computer. If the computer can be turned on, it means
that the battery pack 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 30
Checking the ac power adapter
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:
28 ThinkPad P72 Hardware Maintenance Manual
(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.
Note: Noise from the ac power adapter does not always indicate a defect.
If the computer does not charge during operation, go to “Checking the operational charging” on page 29.
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 (-)
Chapter 3.General checkout 29
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:
1. Remove the battery pack. See “1020 Battery” on page 71.
2. Remove the coin-cell battery. See “1060 Coin-cell battery” on page 77.
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 P72 Hardware Maintenance Manual
Chapter 4. Related service information
This chapter presents following information:
• “Recovery overview for the Windows 10 operating system” on page 31
• “Passwords” on page 32
• “Power management” on page 34
• “Symptom-to-FRU index” on page 35
Service Web site: When the latest maintenance diskette and the system program service diskette become
available, they will be posted on https://support.lenovo.com
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 32.
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:
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.
© Copyright Lenovo 2018 31
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.
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.
32 ThinkPad P72 Hardware Maintenance Manual
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 33.
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 34.
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.
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 “1020 Battery” on
page 71.
Chapter 4.Related service information 33
3. Remove the coin-cell battery. For instructions on how to remove the coin-cell battery, see “1060 Coin-
cell battery” on page 77. Wait for a few seconds.
4. Reinstall the coin-cell battery. For instructions on how to install the coin-cell battery, see “1060 Coin-cell
battery” on page 77.
5. Reinstall the battery pack. For instructions on how to install the battery pack, see “1020 Battery” on
page 71.
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.
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 two power management modes: sleep and hibernation.
34 ThinkPad P72 Hardware Maintenance Manual
Sleep mode
When the computer enters sleep mode, the following events occur:
• 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 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, random access memory (RAM), video random access memory (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.
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 36
• “Error messages” on page 37
• “Beep errors” on page 38
• “No-beep symptoms” on page 39
• “LCD-related symptoms” on page 39
• “Intermittent problems” on page 40
• “Undetermined problems” on page 40
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.
Chapter 4.Related service information 35
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.
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.
0270
Real Time Clock Error — System Real Time Clock is not
functional.
1. Run ThinkPad Setup to reset the time and date
2. Replace the coin-cell battery and run ThinkPad Setup
to reset the time and date.
0271
Check Date and Time settings — Neither the date nor the
time is set in the computer.
1. Run ThinkPad Setup to reset the time and date
2. Replace the coin-cell battery and run ThinkPad Setup
to reset the time and date.
36 ThinkPad P72 Hardware Maintenance Manual
Table 1. Numeric error codes (continued)
Symptom or error FRU or action, in sequence
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.
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.
Chapter 4.Related service information 37
Table 2. Error messages (continued)
Symptom or error FRU or action, in sequence
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 errors
Lenovo SmartBeep technology enables you to decode beep errors with your smartphone when a black
screen occurs with beeps from your computer. To decode the beep error with Lenovo SmartBeep
technology, do the following:
1. Go to https://support.lenovo.com/smartbeep or scan the following QR Code.
2. Download the proper diagnostic app and install it on your smartphone.
3. Run the diagnostic app and place the smartphone near the computer.
4. Press the Fn key on your computer to emit the beep again. The diagnostic app decodes the beep error
and shows possible solutions on the smartphone.
The following section describes some beep errors and the corresponding solutions.
Note: Do not attempt to service a product yourself unless instructed to do so by the Customer Support
Center or product documentation. Only use a Lenovo-authorized service provider to repair your product.
Error codes Solutions
0001: Reset error (platform reset not de-asserted) 1. Remove all power resources (the ac power
adapter, removable battery, and coin-cell battery).
2. Replace the system board (service provider only).
0002: Internal bus error Replace the system board (service provider only).
0281: General embedded controller error Replace the system board (service provider only).
38 ThinkPad P72 Hardware Maintenance Manual
Error codes Solutions
0282: Memory module error 1. Reinstall or replace the memory module.
2. Replace the system board (service provider only).
0283: PCI resource error 1. Remove PCIe devices (the M.2 card, PCIe card,
and so on) (service provider only).
2. Replace the system board (service provider only).
0284: TCG-compliant functionality-related error (might be
the BIOS code validation failure) Replace the system board (service provider only).
0285: TCG-compliant functionality-related error (might be
the TPM initialization failure) Replace the system board (service provider only).
0286: Integrated graphics error Replace the system board (service provider only).
0287: Discrete graphics error 1. Reinstall or replace the discrete graphics card
(service provider only).
2. Replace the system board (service provider only).
0288: Computer display error 1. Reconnect the display cable on both the system
board side and the computer display side (service
provider only).
2. Replace the system board (service provider only).
No-beep symptoms
Table 3. 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.
Chapter 4.Related service information 39
• 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 4. 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.
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.
40 ThinkPad P72 Hardware Maintenance Manual
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 unit
Chapter 4.Related service information 41
42 ThinkPad P72 Hardware Maintenance Manual
Chapter 5. Configuring RAID
This chapter provides information about storage drive requirements for Redundant Array of Independent
Disks (RAID) levels, and instructions on how to configure RAID for your computer.
An Introduction to RAID
RAID 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.
Note: For RAID 0, the missing data resulting from a drive failure cannot be reconstructed.
Storage drive requirements for RAID levels
Your computer supports the following internal storage drives:
• 2.5-inch form factor, 7-mm (0.28-inch) height hard disk drive
• M.2 Non-Volatile Memory Express (NVMe) solid-state drive (available on some models)
Note: Ensure that your computer has two identical storage drives installed (two M.2 NVMe solid-state drives
with the same capacity) for supported RAID levels. If only one drive is installed, or two different types of
drives are installed, the following information does not apply.
Your computer supports the following RAID levels:
• RAID 0: striped disk array
– Consists of two identical storage drives
– Supported strip size: 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB
– Better performance without fault tolerance
– Higher risk of data loss resulting from a member drive failure compared with non-RAID configuration
• RAID 1: mirrored disk array
– Consists of two identical storage drives
– Improved reading performance and 100% redundancy
Configuring RAID with the Intel RST configuration utility
This topic provides the following instructions to help you configure RAID with the Intel RST configuration
utility:
• How to enter the Intel RST configuration utility
• How to create RAID volumes
• How to delete RAID volumes
© Copyright Lenovo 2018 43
• How to reset storage drives to non-RAID
• How to rebuild RAID 1 volumes
Entering the Intel RST configuration utility
This topic provides instructions on how to enter the Intel RST configuration utility.
Enabling RAID from ThinkPad Setup
If RAID is disabled, you must enable it manually before entering the Intel RST configuration utility.
To enable RAID, do the following:
1. Restart the computer. When the logo screen is displayed, press F1 to start the ThinkPad Setup program.
2. Select Config ➙ Storage ➙ Controller Mode ➙ RST mode and then press Enter.
3. Press F10 to save changes and exit.
Entering the Intel RST configuration utility
To enter the Intel RST configuration utility, do the following:
1. Restart the computer. When the logo screen is displayed, press F1 to start the ThinkPad Setup program.
2. Select Config ➙ Storage ➙ Intel (R) Rapid Storage Technology and then press Enter to open the Intel
(R) Rapid Storage Technology window.
The following options are displayed after you enter the Intel RST configuration utility:
• Create RAID Volume: This option is used to create a RAID volume. If no internal storage drives can be
used, this option is not available.
• RAID Volumes: This option is used to confirm the information of the created RAID volumes.
• Non-RAID Physical Disks: This option is used to confirm the information of all non-RAID drives.
Press the up and down arrow keys to select an option. Press Enter to enter the menu for the selected option.
Press Esc to exit the Intel RST configuration utility.
Creating RAID volumes
This topic provides instructions on how to use the Intel RST configuration utility to create RAID volumes.
Attention: All the existing data stored on the selected drives will be erased while the RAID volume is being
created.
To create a RAID volume, do the following:
1. Enter the Intel RST configuration utility. See “Entering the Intel RST configuration utility” on page 44.
2. Press the up and down arrow keys to select Create RAID Volume, and then press Enter to open the
CREATE RAID VOLUME window.
3. Press the up and down arrow keys to select and configure the options one by one.
a. Name: You can use the default name or type a preferred name for the RAID volume.
b. RAID Level: You can press Enter to change the RAID to one of the following:
• RAID0 (Stripe)
• RAID1 (Mirror)
44 ThinkPad P72 Hardware Maintenance Manual
c. Select Disks: Press the up and down arrow keys to select a drive, and then press Spacebar or Enter
to add it into a group. An X mark is displayed next to the selected drive.
Note: The drive that cannot be used to create a RAID volume is not selectable.
d. Strip Size: Press the up and down arrow keys to select a strip size, and then press Enter to complete
the configuration.
Note: This option is only available for RAID 0.
e. Capacity: Customize the capacity of the RAID volume. The default RAID volume is the largest value.
f. Create Volume: Press Enter to finish configurations of the preceding options and create a volume.
Note: The Create Volume option might not be selectable for some reasons, for example, if different
types of drives are selected, the option is not selectable. If it is not selectable, see the message
displayed under Create Volume for reference.
After the RAID volume is created, the Intel (R) Rapid Storage Technology window is displayed, and
the created volume is displayed under RAID Volumes.
4. Press F10 to save changes and exit.
Deleting RAID volumes
This topic provides instructions on how to use the Intel RST configuration utility to delete RAID volumes.
Attention: All the existing data stored on the selected drives will be erased after you delete RAID volumes.
To delete a RAID volume, do the following:
1. Enter the Intel RST configuration utility. See “Entering the Intel RST configuration utility” on page 44.
2. Press the up and down arrow keys to select the volume that you want to delete under RAID Volumes.
Press Enter to open the RAID VOLUME INFO window.
3. Select Delete and press Enter to delete it from the RAID Volumes list.
4. When prompted, select Yes to confirm the deletion of the selected RAID volume.
After you delete the RAID volume, the Intel (R) Rapid Storage Technology window is displayed. Member
drives of the deleted volume are displayed under Non-RAID Physical Disks.
5. Press F10 to save changes and exit.
Resetting storage drives to non-RAID
This topic provides instructions on how to use the Intel RST configuration utility to reset storage drives to
non-RAID.
Attention: All the existing data stored on the selected drive will be erased after you reset it to non-RAID.
To reset a storage drive to non-RAID, do the following:
1. Enter the Intel RST configuration utility. See “Entering the Intel RST configuration utility” on page 44.
2. Press the up and down arrow keys to select the volume that you want to reset under RAID Volumes.
Press Enter to open the RAID VOLUME INFO window.
3. Press the up and down arrow keys to select the drive that you want to reset under RAID Member Disks.
Press Enter to open the PHYSICAL DISK INFO window.
4. Select Reset to Non-RAID and press Enter. When prompted, press Yes to confirm the reset action.
Chapter 5.Configuring RAID 45
After the reset process finishes, the Intel (R) Rapid Storage Technology window is displayed. The reset
drive is listed under Non-RAID Physical Disks, and the volume of the reset drive is still listed under
RAID Volumes, but the status is changed from Normal to Failed or Degraded.
5. Press F10 to save changes and exit.
Rebuilding RAID 1 volumes
If the status of a RAID 1 volume is Failed or Degraded, you can rebuild it through the Intel RST configuration
utility. To rebuild a RAID 1 volume, ensure that at least one member drive of the RAID 1 volume works
correctly. Replace the failed drive with a new one that has the same capacity before you rebuild a RAID 1
volume.
To rebuild a RAID 1 volume, do the following:
1. Enter the Intel RST configuration utility. See “Entering the Intel RST configuration utility” on page 44.
2. Press the up and down arrow keys to select the volume that you want to rebuild under RAID Volumes.
Press Enter to open the RAID VOLUME INFO window.
3. Select Rebuild and press Enter to open the Rebuild Volume window.
4. Select the drive that you want to rebuild and press Enter to initiate the rebuild process.
After you initiate the rebuild process, the Intel (R) Rapid Storage Technology window is displayed. The
RAID 1 volume under rebuilding is displayed under RAID Volumes with a Rebuilding mark.
5. Wait a few minutes. When the rebuild process finishes successfully, the Rebuilding mark is changed to
the Normal mark.
6. Press F10 to save changes and exit.
46 ThinkPad P72 Hardware Maintenance Manual
Chapter 6. Using the special keys
Your computer has several special keys to help you work more easily and effectively.
1 Numeric keypad
You can use this numeric keypad to input numbers quickly.
2 Windows logo key
Press the Windows logo key to open the Start menu. For information about using the Windows logo key with
other keys, see the help information system of the Windows operating system.
3 4 Fn key and function keys
You can configure the Fn key and function keys by doing the following:
1. Go to Control Panel, and then change the view of Control Panel from Category to Large icons or Small
icons.
2. Click Lenovo - Keyboard Manager and the Keyboard Manager window is displayed.
3. Select the options of your preference.
• + Switch the key function between the standard F1–F12 function and the special function
printed as an icon on each key. When the Fn Lock indicator is off, you can use the default function. You
can change the default function in the Keyboard Properties window.
• Mute or unmute the speakers.
If you mute the sound and turn off your computer, the sound will remain muted when you turn on your
computer. To turn on the sound, press or .
• Decrease the speaker volume.
• Increase the speaker volume.
• Mute or unmute the microphones.
• Darken the computer display.
• Brighten the computer display.
• Manage external displays.
© Copyright Lenovo 2018 47
• Enable or disable the built-in wireless features.
• Open the Settings window.
• Enable or disable the built-in Bluetooth features.
• Open a keyboard setting page.
• Invoke the function defined by yourself. To define or change the action for the F12 key, do the
following:
1. Open the Start menu and click the Lenovo Vantage program.
2. Click Hardware Settings and then click Input.
3. Locate the Keyboard: User-defined Key section and follow the instructions on the screen to
complete the setting.
On this setting page, you can also define different functions for the key combinations with F12, such as
Shift+F12, Alt+F12, or Ctrl+F12.
Key combinations
• + : Open the calculator.
• + : Put your computer to sleep mode.
• + : Open the Snipping Tool program.
• Fn+Spacebar: If your computer supports keyboard backlight, press Fn+Spacebar to switch between the
different keyboard backlight status.
• Fn+B: This key combination has the same function as the Break key on a conventional external keyboard.
• Fn+K: This key combination has the same function as the ScrLK or Scroll Lock key on a conventional
external keyboard.
• Fn+P: This key combination has the same function as the Pause key on a conventional external keyboard.
• Fn+S: This key combination has the same function as the SysRq key on a conventional external keyboard.
• Fn+4: Press Fn+4 to put the computer to sleep mode. To wake up the computer, press the Fn key or the
power button.
• Fn+Left arrow key: This key combination has the same function as the Home key.
• Fn+Right arrow key: This key combination has the same function as the End key.
48 ThinkPad P72 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
1 Infrared camera (available on some models) 2 Conventional camera (available on models with the
infrared camera)
3 Microphones (available on some models) 4 Power button
5 Numeric keypad 6 Fingerprint reader
7 NFC label (available on some models) 8 Trackpad with buttons
© Copyright Lenovo 2018 49
9 TrackPoint® buttons 10 TrackPoint pointing stick
11 Speakers
Side views
1 Fan louvers 2 Always On USB 3.1 connector Gen 1
3 Smart-card slot (available on some models)
1 Audio connector 2 USB 3.1 connectors Gen 1
3 SD-card slot 4 Mini DisplayPort® connector
5 Ethernet connector 6 Fan louvers
7 Security-lock slot
Rear view
1 Fan louvers 2 Power connector
3 USB-C™ connectors (Thunderbolt™ 3 compatible) 4 HDMI connector
5 USB 3.1 connector Gen 1
50 ThinkPad P72 Hardware Maintenance Manual
Bottom view
1 Fan louvers 2 Emergency reset hole
3 Keyboard drainage holes
Status indicators
This topic provides information about locating and identifying the various status indicators on your computer.
Note: Depending on the model, your computer might look different from the following illustrations.
Chapter 7.Locations 51
1 Camera status indicator (available on some models)
When this indicator is on, the camera is in use.
2 12 System status indicators
The indicator in the ThinkPad logo on the computer lid and the indicator in the power button show the
system status of your computer.
52 ThinkPad P72 Hardware Maintenance Manual
• Blinks for three times: The computer is initially connected to power.
• On: The computer is on (in normal mode).
• Off: The computer is off or in hibernation mode.
• Blinks rapidly: The computer is entering sleep or hibernation mode.
• Blinks slowly: The computer is in sleep mode.
3 Numeric Lock indicator
When this indicator is on, you can use the numeric keypad to type numbers.
4 Fingerprint reader indicator
This indicator shows the status of fingerprint reader.
1 Off: The fingerprint reader is not ready for tapping.
2 Solid white: The fingerprint reader is ready for tapping.
3 Amber, blinking: The fingerprint cannot be authenticated.
5 Caps Lock indicator
When this indicator is on, you can type uppercase letters by directly pressing the letter keys.
6 Microphone-mute indicator
When this indicator is on, the microphones are muted.
7 Fn Lock indicator
This indicator shows the status of Fn Lock function. For more information, see Chapter 6 “Using the special
keys” on page 47.
8 Speaker-mute indicator
When this indicator is on, the speakers are muted.
9 Wireless-status indicator
When this indicator is on, you can connect the computer to a wireless network or wireless device.
10 Device-access-status indicator
When this indicator is 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.
11 ac power status indicator
This indicator shows the ac power and battery power status of the computer.
• White: connected to ac power (battery power 90%–100%)
• Amber: connected to ac power (battery power 0%–90%)
• Off: not connected to ac power
Locating FRUs and CRUs
This topic introduces the following service parts:
• “Major FRUs” on page 55
• “LCD FRUs” on page 57
• “Miscellaneous parts” on page 58
Chapter 7.Locations 53
Notes:
• 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.” Installation of self-service CRUs is your responsibility. 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 https://
support.lenovo.com. Click Guides & Manuals and then 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:
– 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.
• Each FRU/CRU is available for all types or models, unless otherwise specified.
• A Self-service CRU is identified by a single asterisk (*) in the CRU ID column. An Optional-service CRU is identified
by two asterisks (**). An N in the CRU ID column means that the part is not a CRU.
• FRUs marked with OP are available as options.
54 ThinkPad P72 Hardware Maintenance Manual
Table 5. Major FRUs (continued)
No. FRU descriptions CRU ID
9NFC card antenna *N
10 Trackpad cable N
11 Trackpad button board N
12 Base cover assembly N
13 Right I/O board N
14 Bottom cover *
15 Storage drive *
16 Battery N
17 M.2 solid-state drive *
18 Memory module N
19 System board N
20 DC-in card N
21 DC-in card bracket N
22 Left I/O board cable N
23 Left I/O board N
24 Thermal fan assembly N
25 Smart-card reader cable *N
26 Smart-card reader *N
27 Dummy smart-card reader *N
28 Chassis assembly N
29 Memory module bracket N
30 Wireless LAN card N
31 Speaker assembly N
32 Coin-cell battery **
33 Keyboard **
34 TrackPoint pointing stick *
35 Hinge screw strip cover N
36 Hinge caps N
37 LCD unit (see “LCD FRUs” on page 57) N
aLenovo factory recovery USB key *N
bMiscellaneous parts (see “Miscellaneous parts” on page 58) N
cPower cord *
d ac power adapter *
Notes:
56 ThinkPad P72 Hardware Maintenance Manual
• Depending on the model, the FRU marked with asterisk (*) might not be available on your computer.
• The Lenovo factory recovery USB key a is used to restore the Microsoft Windows operating system. They
might not come with the computer, and a user might order them from https://pcsupport.lenovo.com/
lenovorecovery, though additional shipping and handling fees might apply.
LCD FRUs
Table 6. LCD FRUs
No. FRU descriptions CRU ID
1LCD bezel assembly N
2LCD strip cover N
3LCD panel N
Chapter 7.Locations 57
Table 6. LCD FRUs (continued)
No. FRU descriptions CRU ID
4 Wireless LAN antenna kit N
5Camera card N
6LCD rear cover N
7 Hinge assembly N
8LED/camera cable assembly N
9LCD cable N
10 LED card N
Note: Depending on the model, the FRU marked with asterisk (*) might not be available on your computer.
Miscellaneous parts
Table 7. Miscellaneous parts
FRU descriptions CRU ID
Screw kit
• M2 × 3, silver (20)
• M2 × 8, black (17)
• M2.5 × 5, black (10)
N
Miscellaneous kit
• Rubber for dc-in lens
N
Label kit N
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 55 and “LCD FRUs” on page 57.
Note: Depending on your model, some connectors or cables might not be available.
System board connectors and cables
58 ThinkPad P72 Hardware Maintenance Manual
N-
o.
Connector/feature Internal cable required Cable connection
1USB-C connector (Thunderbolt™ 3
compatible) (external)
No Connect a compatible device to this
connector.
2USB-C connector (Thunderbolt™ 3
compatible) (external)
No Connect a compatible device to this
connector.
3HDMI connector (external) No Connect a compatible projector, external
monitor, or high-definition television to this
connector.
4USB 3.1 connector Gen 1 (external) No Connect USB-compatible devices to this
connector.
5LCD connector (internal) LCD cable Connect one end to the LCD panel and the
other end to this connector.
6LED/camera cable connector
(internal)
LED/camera cable
assembly
The LED/camera cable assembly has three
ends. Connect the camera end to the camera
card, the LED end to the LED card, and the
MB end to this connector.
7Thermal fan assembly connector
(internal)
Thermal fan assembly
cable
The thermal fan assembly comes with cable.
Connect the cable to this connector.
8Right I/O board connector (internal) No Connect the Right I/O board to this
connector.
9Speaker connector (internal) Speaker assembly cable The speaker assembly comes with cable.
Connect the cable to this connector.
10 Coin-cell battery connector
(internal)
Coin-cell battery cable The coin-cell battery comes with cable.
Connect the cable to this connector.
11 NFC module connector (internal) NFC module cable Connect one end to the NFC module and the
other end to this connector.
12 Memory module slot (internal) No Insert the memory module into this slot.
13 Wireless-LAN card (internal) No Insert the wireless-LAN/WiGig card into this
slot.
14 Trackpad connector (internal) Trackpad cable Connect one end to the trackpad and the
other end to this connector.
15 Smart-card connector (internal) Smart card cable Connect one end to the smart card reader
and the other end to this connector.
16 Left I/O board connector (internal) Left I/O board cable Connect one end to the left I/O board and
the other end to this connector.
Chapter 7.Locations 59
N-
o.
Connector/feature Internal cable required Cable connection
17 TrackPoint connector (internal) Keyboard assembly with
cable
The keyboard assembly comes with cable.
Connect theTrackPoint cable to this
connector and the other cable to the
keyboard connector.
18 Keyboard connector (internal) Keyboard assembly with
cable
The keyboard assembly comes with cable.
Connect the keyboard cable to this
connector, and connect the other cable to
the TrackPoint connector.
19 Thermal fan assembly connector
(internal)
Thermal fan assembly
cable
The thermal fan assembly comes with cable.
Connect the cable to this connector.
20 Solid-state drive slot (internal) No Insert the solid-state drive directly into this
slot.
21 Solid-state drive slot (internal) No Insert the solid-state drive directly into this
slot.
22 DC-in connector (internal) No The DC-in board comes with cable. Connect
the cable to this connector.
23 HDD cable connector (internal) HDD cable Connect the HDD cable to this connector.
24 Battery connector (internal) No The battery comes with cable. Connect the
cable to this connector.
25 Memory module slot (internal) No Insert the memory module into this slot.
Power botton board connector
No. Connector/feature Internal cable required Cable connection
1Power botton board connector
(internal)
Power botton board cable Connect one end to the Power botton
board connector on the system board and
the other end to this connector.
Fingerprint reader connector
No. Connector/feature Internal cable required Cable connection
1Fingerprint reader connector
(internal)
Fingerprint reader cable Connect one end to the Fingerprint reader
connector on the system board and the
other end to this connector.
60 ThinkPad P72 Hardware Maintenance Manual
NFC card connector
No. Connector/feature Internal cable required Cable connection
1NFC card connector (internal) NFC card cable Connect one end to the NFC connector on
the system board and the other end to this
connector.
2NFC antenna connector (internal) NFC antenna cable The NFC antenna comes with a cable.
Connect the cable to this connector.
Trackpad connector and trackpad button connector
No. Connector/feature Internal cable required Cable connection
1Trackpad connector Trackpad cable Connect one end to the trackpad
connector on the system board and the
other end to this connector.
2Trackpad button connector Trackpad button cable The trackpad buttons comes with a
trackpad button cable. Connect the cable
to this connector.
Smart card connector
No. Connector/feature Internal cable required Cable connection
1Smart card connector Smart card cable Connect one end to the smart card
connector on the system board and the
other end to this connector.
Chapter 7.Locations 61
Right I/O board connectors and cables
No. Connector/feature Internal cable required Cable connection
1Power-button-board connector
(internal)
Power-button-board cable Connect one end to the power button
board and the other end to this connector.
2Fingerprint reader connector
(internal)
Fingerprint reader cable Connect one end to the fingerprint reader
card and the other end to this connector.
3Ethernet connector (external) Ethernet cable Connect the computer to a LAN through
this connector.
4Mini DisplayPort connector
(external)
No Connect a compatible projector, external
monitor, or high-definition television to this
connector.
5SD card slot (external) No Insert the SD card into this slot.
6USB 3.1 connectors Gen 1
(external)
No Connect USB-compatible devices to this
connector.
7USB 3.1 connectors Gen 1
(external)
No Connect USB-compatible devices to this
connector.
8Audio connector (external) No Connect headphones or a headset with
3.5- mm (0.14-inch) 4-pole plug to this
connector.
9Right I/O board connector (internal) No Connect to the system board.
Left I/O board connectors and cables
62 ThinkPad P72 Hardware Maintenance Manual
No. Connector/feature Internal cable required Cable connection
1Always On USB 3.1 connector Gen
1 (external)
No Connect USB-compatible devices to this
connector.
2Left I/O board connector (internal) Left I/O board cable Connect one end to the system board and
the other end to this connector.
Camera/microphone card connector and cable
Item Connector (location) Internal cable required Cable connection
1Camera/microphone card
connector (internal)
Camera/LED cable assembly Connect one end to the LED
connector on the system board
and the other end to this
connector.
LCD panel connector
No. Connector/feature Internal cable required Cable connection
1LCD panel connector LCD cable Connect one end to the LCD connector on
the system board and the other end to this
connector.
LED card connector
No. Connector/feature Internal cable required Cable connection
1LED card connector LED/camera cable
assembly
Connect one end to the LCD connector on
the system board, one end to the camera
connector on the camera board, and the
remaining end to this connector.
Chapter 7.Locations 63
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 https://support.lenovo.com. 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.
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 https://support.lenovo.com/
partslookup.
• 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 2018 65
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 66
• “Retaining the UUID” on page 67
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 https://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.
66 ThinkPad P72 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 https://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 67
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.
68 ThinkPad P72 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 https://
support.lenovo.com. Follow the on-screen instructions to find the manual for your product. 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 65.
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 2018 69
• 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.
Disabling the built-in battery
Before replacing any RU, ensure that you disable Fast Startup first and then disable the built-in battery.
To disable Fast Startup, do the following:
1. Go to Control Panel, and then change the view of Control Panel from Category to Large icons or Small
icons.
2. Click Power Options, and then click Choose what the power buttons do on the left pane.
3. Click Change settings that are currently unavailable at the top.
4. If prompted by User Account Control (UAC), click Yes.
5. Clear the Turn on fast startup check box, and then click Save changes.
To disable the built-in battery, do the following:
1. Restart your computer. When the logo screen is displayed, immediately press F1 to enter ThinkPad
Setup.
2. Select Config ➙ Power. The Power submenu is displayed.
3. Select Disable built-in battery and press Enter.
4. Select Yes in the Setup Confirmation window. The built-in battery is disabled and the computer turns off
automatically. Wait three to five minutes to let the computer cool.
Removing a major FRU
This section provides instructions on how to remove a major FRU.
1010 Bottom cover
For access, remove this FRU:
Removal steps of the bottom cover
Note: Loosen the screws 1 in ascending alphabetical order (a to g) as illustrated, and remove the bottom
cover.
70 ThinkPad P72 Hardware Maintenance Manual
1a
1b
1c
1d
1e
1f
1g
1020 Battery
For access, remove these FRUs:
• “1010 Bottom cover” on page 70
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.
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 71
Step Screw (quantity) Color Torque
2M2 × 8 mm, flat-head, nylon-coated (4) Black 0.181 Nm
(1.85 kgf-cm)
1030 Storage drive
For access, remove these FRUs:
• “1010 Bottom cover” on page 70
Attention:
• 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.
Removal steps of the 2.5-inch storage drive and drive cable
72 ThinkPad P72 Hardware Maintenance Manual
Removal steps of the memory module under the bottom cover
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 Keyboard
For access, remove these FRUs:
• “1010 Bottom cover” on page 70
Note: You might be instructed to slide the keyboard frame forward or backward in some of the following
steps. In this case, ensure that you do not press or hold the keys while sliding the keyboard frame.
Otherwise, the keyboard frame cannot be moved.
74 ThinkPad P72 Hardware Maintenance Manual
Removal steps of the keyboard
1. Loosen the screws that secure the keyboard.
Step Screw (quantity) Color Torque
1M2 × 8 mm, flat-head, nylon-coated (1) Black 0.181 Nm
(1.85 kgf-cm)
2. Take the tool out of the new keyboard package. Insert the tabs a and b into the slot between the
TrackPoint buttons and the trackpad 2. Slightly pivot the tool downward 3 to release the left and right
TrackPoint buttons. Then remove the two TrackPoint buttons 4.
Note: If the keyboard must be removed to access other FRUs, you need the keyboard removal tool
(product part number: 01LX856) to remove the keyboard. You can purchase the tool as a separate FRU
at: https://support.lenovo.com/partslookup.
a b
Chapter 9.Removing or replacing a FRU 75
3. Loosen the screws that secure the keyboard.
4. Insert the tabs c and d into the two dents near the two screw heads as shown.
c d
5. Pivot the tool in the direction as shown to release the keyboard 7. Push the keyboard in the direction as
shown by arrows 8 to release the latches from the keyboard bezel.
FnLock
F6
NumLock
76 ThinkPad P72 Hardware Maintenance Manual
6. Pivot the keyboard slightly upward as shown by arrow 9. Then turn the keyboard over as shown by
arrow 10 .
FnLock
F6
NumLock
7. Put the keyboard on the palm rest as shown and detach the connectors. Then remove the keyboard.
1060 Coin-cell battery
For access, remove these FRUs:
• “1010 Bottom cover” on page 70
• “1050 Keyboard” on page 74
DANGER
Use only the authorized battery specified for your computer. Any other battery could ignite or
explode.
Chapter 9.Removing or replacing a FRU 77
Removal steps of the coin-cell battery
When installing:
Ensure that the coin-cell battery connector is attached firmly.
1070 Memory module bracket and memory module under the keyboard
For access, remove these FRUs:
• “1010 Bottom cover” on page 70
• “1050 Keyboard” on page 74
Removal steps of the memory module bracket
Step Screw (quantity) Color Torque
1M2 × 3 mm, flat-head, nylon-coated (1) Silver 0.181 Nm
(1.85 kgf-cm)
78 ThinkPad P72 Hardware Maintenance Manual
Removal steps of the memory module under the keyboard
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 Bottom cover” on page 70
• “1050 Keyboard” on page 74
Removal steps of the wireless LAN card
Step Screw (quantity) Color Torque
2M2 × 3 mm, flat-head, nylon-coated (1) Silver 0.181 Nm
(1.85 kgf-cm)
Chapter 9.Removing or replacing a FRU 79
When installing:
Plug the gray cable into the main connector on the card; and plug the black cable into the auxiliary connector
on the card.
1090 Keyboard bezel assembly
For access, remove these FRUs:
• “1010 Bottom cover” on page 70
• “1050 Keyboard” on page 74
Removal steps of the keyboard bezel assembly
Step Screw (quantity) Color Torque
1M2 × 8 mm, flat-head, nylon-coated (4) Black 0.181 Nm
(1.85 kgf-cm)
2M2.5 × 5 mm, flat-head, nylon-coated (2) Black 0.294 Nm
(3.0 kgf-cm)
80 ThinkPad P72 Hardware Maintenance Manual
When installing:
Ensure that all the latches are well assembled and there is no abnormal gap.
1110 NFC card, fingerprint reader card, trackpad cable, trackpad button
board, and power button board
For access, remove these FRUs in order:
• “1010 Bottom cover” on page 70
• “1050 Keyboard” on page 74
• “1090 Keyboard bezel assembly” on page 80
Removal steps of the NFC card
Chapter 9.Removing or replacing a FRU 81
When installing:
Ensure that the connector is attached firmly.
Removal steps of the fingerprint reader card
82 ThinkPad P72 Hardware Maintenance Manual
Removal steps of the trackpad cable
When installing:
Ensure that the connector is attached firmly.
Removal steps of the trackpad button board
Step Screw (quantity) Color Torque
3M2 × 3 mm, flat-head, nylon-coated (2) Silver 0.181 Nm
(1.85 kgf-cm)
84 ThinkPad P72 Hardware Maintenance Manual
1120 Speaker assembly
For access, remove these FRUs:
• “1010 Bottom cover” on page 70
• “1050 Keyboard” on page 74
• “1090 Keyboard bezel assembly” on page 80
Removal steps of the speaker assembly
Step Screw (quantity) Color Torque
3M2 x 2.3, flat-head, nylon-coated (2) Silver 0.181 Nm
(1.85 kgf-cm)
86 ThinkPad P72 Hardware Maintenance Manual
1130 Hinge caps and LCD unit
For access, remove these FRUs:
• “1010 Bottom cover” on page 70
• “1050 Keyboard” on page 74
• “1090 Keyboard bezel assembly” on page 80
• “1120 Speaker assembly” on page 86
Removal steps of the hinge caps and LCD unit
Step Screw (quantity) Color Torque
1M2.5 × 7 mm, flat-head, nylon-coated (2) Black 0.294 Nm
(3.0 kgf-cm)
2M2.5 × 5 mm, flat-head, nylon-coated (2) Black 0.294 Nm
(3.0 kgf-cm)
Chapter 9.Removing or replacing a FRU 87
Step Screw (quantity) Color Torque
8M2 × 3 mm, flat-head, nylon-coated (2) Silver 0.181 Nm
(1.85 kgf-cm)
88 ThinkPad P72 Hardware Maintenance Manual
Step Screw (quantity) Color Torque
10 M2.5 × 7 mm, flat-head, nylon-coated (2) Black 0.294 Nm
(3.0 kgf-cm)
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.
Chapter 9.Removing or replacing a FRU 89
1140 Chassis assembly
For access, remove these FRUs in order:
• “1020 Battery” on page 71
• “1010 Bottom cover” on page 70
• “1050 Keyboard” on page 74
• “1090 Keyboard bezel assembly” on page 80
• “1120 Speaker assembly” on page 86
• “1130 Hinge caps and LCD unit” on page 87
Removal steps of the chassis assembly
Step Screw (quantity) Color Torque
1M2 × 8 mm, flat-head, nylon-coated (8) Black 0.181 Nm
(1.85 kgf-cm)
2M2.5 × 5 mm, flat-head, nylon-coated (6) Black 0.294 Nm
(3.0 kgf-cm)
90 ThinkPad P72 Hardware Maintenance Manual
1150 Left I/O board, Left I/O board cable, and right I/O board
For access, remove these FRUs:
• “1020 Battery” on page 71
• “1010 Bottom cover” on page 70
• “1050 Keyboard” on page 74
• “1090 Keyboard bezel assembly” on page 80
• “1120 Speaker assembly” on page 86
• “1130 Hinge caps and LCD unit” on page 87
• “1140 Chassis assembly ” on page 90
Removal steps of the Left I/O board and Left I/O board cable
Chapter 9.Removing or replacing a FRU 91
Step Screw (quantity) Color Torque
4M2 × 5 mm, flat-head, nylon-coated (1) Black 0.181 Nm
(1.85 kgf-cm)
When installing:
Ensure that the connector is attached firmly.
Removal steps of the right I/O board
Step Screw (quantity) Color Torque
1M2 × 3 mm, flat-head, nylon-coated (2) Silver 0.181 Nm
(1.85 kgf-cm)
92 ThinkPad P72 Hardware Maintenance Manual
When installing:
Ensure that the connector is attached firmly.
1160 Smart card reader, smart card reader cable, or dummy smart card
For access, remove these FRUs:
• “1020 Battery” on page 71
• “1010 Bottom cover” on page 70
• “1050 Keyboard” on page 74
• “1090 Keyboard bezel assembly” on page 80
• “1120 Speaker assembly” on page 86
• “1130 Hinge caps and LCD unit” on page 87
• “1140 Chassis assembly ” on page 90
Removal steps of the smart card reader and smart card reader cable
Step Screw (quantity) Color Torque
1M2 × 3 mm, flat-head, nylon-coated (2) Silver 0.181 Nm
(1.85 kgf-cm)
When installing:
Ensure that the connector is attached firmly.
Chapter 9.Removing or replacing a FRU 93
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.
Step Screw (quantity) Color Torque
1M2 × 3 mm, flat-head, nylon-coated (2) Silver 0.181 Nm
(1.85 kgf-cm)
1170 Thermal fan assembly
For access, remove these FRUs:
• “1020 Battery” on page 71
• “1010 Bottom cover” on page 70
• “1050 Keyboard” on page 74
• “1090 Keyboard bezel assembly” on page 80
• “1120 Speaker assembly” on page 86
• “1130 Hinge caps and LCD unit” on page 87
• “1140 Chassis assembly ” on page 90
Removal steps of the thermal fan assembly
Detach the thermal fan assembly connector.
94 ThinkPad P72 Hardware Maintenance Manual
Loosen the screws in ascending alphabetical order (2a to 2h) as illustrated, and then remove the thermal fan
assembly.
When installing:
• Do not touch the areas marked a and b in the following illustrations.
• 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, dc-in bracket, dc-in cable assembly, and base cover
assembly
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.
Chapter 9.Removing or replacing a FRU 95
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.
• 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 Bottom cover” on page 70
• “1020 Battery” on page 71
• “1030 Storage drive” on page 72
• “1050 Keyboard” on page 74
• “1070 Memory module bracket and memory module under the keyboard ” on page 78
• “1060 Coin-cell battery” on page 77
• “1080 Wireless LAN card” on page 79
• “1090 Keyboard bezel assembly” on page 80
• “1110 NFC card, fingerprint reader card, trackpad cable, trackpad button board, and power button
board” on page 81
• “1120 Speaker assembly” on page 86
• “1130 Hinge caps and LCD unit” on page 87
• “1140 Chassis assembly ” on page 90
• “1150 Left I/O board, Left I/O board cable, and right I/O board” on page 91
• “1160 Smart card reader, smart card reader cable, or dummy smart card” on page 93
• “1170 Thermal fan assembly” on page 94
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)
96 ThinkPad P72 Hardware Maintenance Manual
Removal steps of the system board, dc-in bracket, dc-in cable assembly, and base cover assembly
Step Screw (quantity) Color Torque
1M2 × 5 mm, flat-head, nylon-coated (1) Black 0.181 Nm
(1.85 kgf-cm)
Step Screw (quantity) Color Torque
3M2 × 5 mm, flat-head, nylon-coated (2) Black 0.181 Nm
(1.85 kgf-cm)
Chapter 9.Removing or replacing a FRU 97
When installing:
Ensure that the connector is attached firmly.
Label locations on the base cover assembly
1 IMEI label 2 Serial number label
3 Wireless label for special-bid products 4 GML label
5 Asset tag 6 Country label
7 India system label 8 GEO label
9 TAA label 10 China CECP label
Removing an LCD FRU
This section provides instructions on how to remove an LCD FRU for models without touch feature.
2010 LCD strip cover and LCD bezel assembly
For access, remove this FRU:
• “1010 Bottom cover” on page 70
• “1020 Battery” on page 71
• “1130 Hinge caps and LCD unit” on page 87
98 ThinkPad P72 Hardware Maintenance Manual
Removal steps of LCD strip cover and LCD bezel assembly
Step Screw (quantity) Color Torque
1M2.5 × 7 mm, flat-head, nylon-coated (2) Black 0.294 Nm
(3.0 kgf-cm)
When installing:
Ensure that all the latches are attached firmly.
2020 LED card
For access, remove these FRUs in order:
• “1010 Bottom cover” on page 70
• “1020 Battery” on page 71
• “1130 Hinge caps and LCD unit” on page 87
• “2010 LCD strip cover and LCD bezel assembly” on page 98
Chapter 9.Removing or replacing a FRU 99
Removal steps of the LED card
2030 LCD panel, LCD cable, and hinge assembly
For access, remove these FRUs in order:
• “1010 Bottom cover” on page 70
• “1020 Battery” on page 71
• “1130 Hinge caps and LCD unit” on page 87
• “2010 LCD strip cover and LCD bezel assembly” on page 98
• “2020 LED card” on page 99
100 ThinkPad P72 Hardware Maintenance Manual
When installing:
Ensure that the LCD connector is attached firmly.
Removal steps of the hinge assembly
Step Screw (quantity) Color Torque
1M2.5 × 3.5 mm, flat-head, nylon-coated (4) Black 0.294 Nm
(3.0 kgf-cm)
2040 Camera card and LED/camera cable assembly
For access, remove these FRUs:
• “1010 Bottom cover” on page 70
• “1020 Battery” on page 71
• “1130 Hinge caps and LCD unit” on page 87
• “2010 LCD strip cover and LCD bezel assembly” on page 98
• “2020 LED card” on page 99
• “2030 LCD panel, LCD cable, and hinge assembly” on page 100
102 ThinkPad P72 Hardware Maintenance Manual
Removal steps of the camera card
Removal steps of the LED/camera cable assembly
When installing:
Ensure that the connectors are attached firmly.
2050 Wireless LAN antenna kit and LCD rear cover assembly
For access, remove these FRUs in order:
• “1010 Bottom cover” on page 70
Chapter 9.Removing or replacing a FRU 103
• “1020 Battery” on page 71
• “1130 Hinge caps and LCD unit” on page 87
• “2010 LCD strip cover and LCD bezel assembly” on page 98
• “2020 LED card” on page 99
• “2030 LCD panel, LCD cable, and hinge assembly” on page 100
• “2040 Camera card and LED/camera cable assembly” on page 102
Removal steps of the wireless LAN antenna kit and LCD rear cover assembly
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.
Antenna location
104 ThinkPad P72 Hardware Maintenance Manual
106 ThinkPad P72 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
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108 ThinkPad P72 Hardware Maintenance Manual
Part Number: SP40M12309
Printed in China
(1P) P/N: SP40M12309
*1PSP40M12309*