DELL 3541 User Manual

Displayed below is the user manual for 3541 by DELL which is a product in the Notebooks category. This manual has pages.

Related Manuals

DELL 3541 Manual

Dell Precision 3541

Service Manual

Regulatory Model: P80G

Regulatory Type: P80F003

Notes, cautions, and warnings

NOTE: A NOTE indicates important information that helps you make better use of your product.

CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.

WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

may be trademarks of their respective owners.

2019 - 05

Rev. A00

Contents

1 Working on your computer............................................................................................................................. 6

Safety instructions.............................................................................................................................................................6

Before working inside your computer........................................................................................................................6

Safety precautions....................................................................................................................................................... 7

Electrostatic discharge—ESD protection................................................................................................................. 7

ESD eld service kit ....................................................................................................................................................8

Transporting sensitive components........................................................................................................................... 9

After working inside your computer...........................................................................................................................9

2 Technology and components........................................................................................................................ 10

DDR4..................................................................................................................................................................................10

DDR4 Details............................................................................................................................................................... 10

Memory Errors.............................................................................................................................................................11

USB features......................................................................................................................................................................11

USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)............................................................................................................ 11

Speed........................................................................................................................................................................... 12

Applications................................................................................................................................................................. 13

Compatibility................................................................................................................................................................13

USB Type-C.......................................................................................................................................................................13

Alternate Mode........................................................................................................................................................... 13

USB Power Delivery................................................................................................................................................... 14

USB Type-C and USB 3.1........................................................................................................................................... 14

Thunderbolt over USB Type-C..................................................................................................................................14

Thunderbolt 3 over USB Type-C.............................................................................................................................. 14

Key Features of Thunderbolt 3 over USB Type-C .................................................................................................15

Thunderbolt Icons.......................................................................................................................................................15

HDMI 1.4.............................................................................................................................................................................15

HDMI 1.4 Features...................................................................................................................................................... 15

Advantages of HDMI..................................................................................................................................................16

USB features..................................................................................................................................................................... 16

USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)............................................................................................................16

Speed........................................................................................................................................................................... 16

Applications..................................................................................................................................................................17

Compatibility................................................................................................................................................................18

Power button LED behavior............................................................................................................................................ 18

Power button LED behavior without Fingerprint readerPower On and LED behavior with Fingerprint

reader........................................................................................................................................................................... 18

3 Disassembly and reassembly........................................................................................................................20

Base cover........................................................................................................................................................................ 20

Removing the base cover......................................................................................................................................... 20

Installing the base cover............................................................................................................................................22

Battery...............................................................................................................................................................................24

Contents 3

Lithium-ion battery precautions............................................................................................................................... 24

Removing the battery................................................................................................................................................24

Installing the battery..................................................................................................................................................25

Memory modules............................................................................................................................................................. 26

Removing the memory modules.............................................................................................................................. 26

Installing the memory modules................................................................................................................................. 27

WLAN card....................................................................................................................................................................... 28

Removing the WLAN card........................................................................................................................................ 28

Installing the WLAN card.......................................................................................................................................... 29

WWAN card......................................................................................................................................................................30

Removing the WWAN............................................................................................................................................... 30

Installing the WWAN.................................................................................................................................................. 31

Hard disk drive..................................................................................................................................................................32

Removing the Hard drive.......................................................................................................................................... 32

Installing the Hard drive.............................................................................................................................................33

Coin-cell battery...............................................................................................................................................................34

Removing the Coin-cell.............................................................................................................................................34

Installing the Coin-cell............................................................................................................................................... 35

DC-in port......................................................................................................................................................................... 36

Removing the DC-in.................................................................................................................................................. 36

Installing the DC-in.....................................................................................................................................................37

Solid state drive................................................................................................................................................................38

Removing the SSD.....................................................................................................................................................38

Installing the SSD.......................................................................................................................................................39

Inner frame....................................................................................................................................................................... 40

Removing the inner frame........................................................................................................................................ 40

Installing the inner frame...........................................................................................................................................42

Touchpad buttons............................................................................................................................................................ 44

Removing the touchpad buttons............................................................................................................................. 44

Installing the touchpad buttons................................................................................................................................45

SmartCard reader............................................................................................................................................................ 46

Removing the smart card reader board.................................................................................................................. 46

Installing the smart card reader board.....................................................................................................................48

Touchpad buttons............................................................................................................................................................ 49

Removing the touchpad buttons............................................................................................................................. 49

Installing the touchpad buttons............................................................................................................................... 50

LED board.......................................................................................................................................................................... 51

Removing the LED board...........................................................................................................................................51

Installing the LED board............................................................................................................................................ 52

Speakers........................................................................................................................................................................... 54

Removing the speakers.............................................................................................................................................54

Installing the speakers............................................................................................................................................... 55

Heatsink assembly-Discrete............................................................................................................................................57

Removing the heatsink assembly-discrete..............................................................................................................57

Installing the heatsink assembly-discrete................................................................................................................58

Heatsink assembly-UMA.................................................................................................................................................60

Removing the heatsink assembly-UMA...................................................................................................................61

4Contents

Installing the heatsink assembly-UMA.....................................................................................................................62

System board................................................................................................................................................................... 65

Removing the system board.....................................................................................................................................65

Installing the system board....................................................................................................................................... 67

Keyboard........................................................................................................................................................................... 69

Removing the Keyboard............................................................................................................................................69

Installing the Keyboard.............................................................................................................................................. 70

Keyboard bracket............................................................................................................................................................. 72

Removing the keyboard bracket.............................................................................................................................. 72

Installing the keyboard bracket.................................................................................................................................73

Power button.................................................................................................................................................................... 74

Removing the power button with ngerprint reader.............................................................................................74

Installing the power button with ngerprint........................................................................................................... 75

Display assembly...............................................................................................................................................................76

Removing the display assembly................................................................................................................................76

Installing the display assembly.................................................................................................................................. 79

Display bezel..................................................................................................................................................................... 82

Removing the display bezel.......................................................................................................................................82

Installing the display bezel.........................................................................................................................................83

Hinge caps........................................................................................................................................................................ 84

Removing the hinge caps..........................................................................................................................................84

Installing the hinge caps............................................................................................................................................85

Display panel.....................................................................................................................................................................86

Removing the display panel...................................................................................................................................... 86

Installing the display panel.........................................................................................................................................89

Palmrest assembly............................................................................................................................................................ 91

Removing the palm-rest and keyboard assembly...................................................................................................91

Installing the palm-rest and keyboard assembly.....................................................................................................92

4 Troubleshooting........................................................................................................................................... 94

Enhanced Pre-Boot System Assessment (ePSA) diagnostics...................................................................................94

Running the ePSA diagnostics................................................................................................................................. 94

System diagnostic lights................................................................................................................................................. 94

WiFi power cycle..............................................................................................................................................................95

5 Getting help.................................................................................................................................................97

Contacting Dell................................................................................................................................................................. 97

Contents 5

Working on your computer

Safety instructions

Prerequisite

Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless otherwise

noted, each procedure included in this document assumes that the following conditions exist:

• You have read the safety information that shipped with your computer.

• A component can be replaced or, if purchased separately, installed by performing the removal procedure in reverse order.

About this task

WARNING: Disconnect all power sources before opening the computer cover or panels. After you nish working inside the

computer, replace all covers, panels, and screws before connecting to the power source.

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional

safety best practices information, see the Regulatory Compliance Homepage

CAUTION: Many repairs may only be done by a certied service technician. You should only perform troubleshooting and simple

repairs as authorized in your product documentation, or as directed by the online or telephone service and support team.

Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions

that came with the product.

CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an

unpainted metal surface at the same time as touching a connector on the back of the computer.

CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its

edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by its pins.

CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have

connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the

cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also, before you connect a

cable, ensure that both connectors are correctly oriented and aligned.

NOTE: The color of your computer and certain components may appear dierently than shown in this document.

Before working inside your computer

About this task

To avoid damaging your computer, perform the following steps before you begin working inside the computer.

Steps

1 Ensure that you follow the Safety Instruction.

2 Ensure that your work surface is at and clean to prevent the computer cover from being scratched.

3 Turn o your computer.

4 Disconnect all network cables from the computer.

CAUTION: To disconnect a network cable, rst unplug the cable from your computer and then unplug the cable from

the network device.

5 Disconnect your computer and all attached devices from their electrical outlets.

6 Press and hold the power button while the computer is unplugged to ground the system board.

6 Working on your computer

NOTE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an

unpainted metal surface at the same time as touching a connector on the back of the computer.

Safety precautions

The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions.

Observe the following safety precautions before you perform any installation or break/x procedures involving disassembly or reassembly:

• Turn o the system and all attached peripherals.

• Disconnect the system and all attached peripherals from AC power.

• Disconnect all network cables, telephone, and telecommunications lines from the system.

• Use an ESD eld service kit when working inside any to avoid electrostatic discharge (ESD) damage.

• After removing any system component, carefully place the removed component on an anti-static mat.

• Wear shoes with non-conductive rubber soles to reduce the chance of getting electrocuted.

Standby power

Dell products with standby power must be unplugged before you open the case. Systems that incorporate standby power are essentially

powered while turned o. The internal power enables the system to be remotely turned on (wake on LAN) and suspended into a sleep

mode and has other advanced power management features.

Unplugging, pressing and holding the power button for 15 seconds should discharge residual power in the system board. .

Bonding

Bonding is a method for connecting two or more grounding conductors to the same electrical potential. This is done through the use of a

eld service electrostatic discharge (ESD) kit. When connecting a bonding wire, ensure that it is connected to bare metal and never to a

painted or non-metal surface. The wrist strap should be secure and in full contact with your skin, and ensure that you remove all jewelry

such as watches, bracelets, or rings prior to bonding yourself and the equipment.

Electrostatic discharge—ESD protection

ESD is a major concern when you handle electronic components, especially sensitive components such as expansion cards, processors,

memory DIMMs, and system boards. Very slight charges can damage circuits in ways that may not be obvious, such as intermittent

problems or a shortened product life span. As the industry pushes for lower power requirements and increased density, ESD protection is an

increasing concern.

Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than in previous

Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.

Two recognized types of ESD damage are catastrophic and intermittent failures.

•Catastrophic – Catastrophic failures represent approximately 20 percent of ESD-related failures. The damage causes an immediate and

complete loss of device functionality. An example of catastrophic failure is a memory DIMM that has received a static shock and

immediately generates a "No POST/No Video" symptom with a beep code emitted for missing or nonfunctional memory.

•Intermittent – Intermittent failures represent approximately 80 percent of ESD-related failures. The high rate of intermittent failures

means that most of the time when damage occurs, it is not immediately recognizable. The DIMM receives a static shock, but the

tracing is merely weakened and does not immediately produce outward symptoms related to the damage. The weakened trace may

take weeks or months to melt, and in the meantime may cause degradation of memory integrity, intermittent memory errors, etc.

The more dicult type of damage to recognize and troubleshoot is the intermittent (also called latent or "walking wounded") failure.

Perform the following steps to prevent ESD damage:

Working on your computer 7

• Use a wired ESD wrist strap that is properly grounded. The use of wireless anti-static straps is no longer allowed; they do not provide

adequate protection. Touching the chassis before handling parts does not ensure adequate ESD protection on parts with increased

sensitivity to ESD damage.

• Handle all static-sensitive components in a static-safe area. If possible, use anti-static oor pads and workbench pads.

• When unpacking a static-sensitive component from its shipping carton, do not remove the component from the anti-static packing

material until you are ready to install the component. Before unwrapping the anti-static packaging, ensure that you discharge static

electricity from your body.

• Before transporting a static-sensitive component, place it in an anti-static container or packaging.

ESD eld service kit

The unmonitored Field Service kit is the most commonly used service kit. Each Field Service kit includes three main components: anti-static

mat, wrist strap, and bonding wire.

Components of an ESD eld service kit

The components of an ESD eld service kit are:

•Anti-Static Mat – The anti-static mat is dissipative and parts can be placed on it during service procedures. When using an anti-static

mat, your wrist strap should be snug and the bonding wire should be connected to the mat and to any bare metal on the system being

worked on. Once deployed properly, service parts can be removed from the ESD bag and placed directly on the mat. ESD-sensitive

items are safe in your hand, on the ESD mat, in the system, or inside a bag.

•Wrist Strap and Bonding Wire – The wrist strap and bonding wire can be either directly connected between your wrist and bare metal

on the hardware if the ESD mat is not required, or connected to the anti-static mat to protect hardware that is temporarily placed on

the mat. The physical connection of the wrist strap and bonding wire between your skin, the ESD mat, and the hardware is known as

bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never use wireless wrist straps. Always be aware that the

internal wires of a wrist strap are prone to damage from normal wear and tear, and must be checked regularly with a wrist strap tester

in order to avoid accidental ESD hardware damage. It is recommended to test the wrist strap and bonding wire at least once per week.

•ESD Wrist Strap Tester – The wires inside of an ESD strap are prone to damage over time. When using an unmonitored kit, it is a best

practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A wrist strap tester is the best

method for doing this test. If you do not have your own wrist strap tester, check with your regional oce to nd out if they have one.

To perform the test, plug the wrist-strap's bonding-wire into the tester while it is strapped to your wrist and push the button to test. A

green LED is lit if the test is successful; a red LED is lit and an alarm sounds if the test fails.

•Insulator Elements – It is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal parts that are

insulators and often highly charged.

•Working Environment – Before deploying the ESD Field Service kit, assess the situation at the customer location. For example,

deploying the kit for a server environment is dierent than for a desktop or portable environment. Servers are typically installed in a rack

within a data center; desktops or portables are typically placed on oce desks or cubicles. Always look for a large open at work area

that is free of clutter and large enough to deploy the ESD kit with additional space to accommodate the type of system that is being

repaired. The workspace should also be free of insulators that can cause an ESD event. On the work area, insulators such as Styrofoam

and other plastics should always be moved at least 12 inches or 30 centimeters away from sensitive parts before physically handling any

hardware components

•ESD Packaging – All ESD-sensitive devices must be shipped and received in static-safe packaging. Metal, static-shielded bags are

preferred. However, you should always return the damaged part using the same ESD bag and packaging that the new part arrived in.

The ESD bag should be folded over and taped shut and all the same foam packing material should be used in the original box that the

new part arrived in. ESD-sensitive devices should be removed from packaging only at an ESD-protected work surface, and parts should

never be placed on top of the ESD bag because only the inside of the bag is shielded. Always place parts in your hand, on the ESD mat,

in the system, or inside an anti-static bag.

•Transporting Sensitive Components – When transporting ESD sensitive components such as replacement parts or parts to be

returned to Dell, it is critical to place these parts in anti-static bags for safe transport.

ESD protection summary

It is recommended that all eld service technicians use the traditional wired ESD grounding wrist strap and protective anti-static mat at all

times when servicing Dell products. In addition, it is critical that technicians keep sensitive parts separate from all insulator parts while

performing service and that they use anti-static bags for transporting sensitive components.

8Working on your computer

Transporting sensitive components

When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place these parts in

anti-static bags for safe transport.

Lifting equipment

Adhere to the following guidelines when lifting heavy weight equipment:

CAUTION: Do not lift greater than 50 pounds. Always obtain additional resources or use a mechanical lifting device.

1 Get a rm balanced footing. Keep your feet apart for a stable base, and point your toes out.

2 Tighten stomach muscles. Abdominal muscles support your spine when you lift, osetting the force of the load.

3 Lift with your legs, not your back.

4 Keep the load close. The closer it is to your spine, the less force it exerts on your back.

5 Keep your back upright, whether lifting or setting down the load. Do not add the weight of your body to the load. Avoid twisting your

body and back.

6 Follow the same techniques in reverse to set the load down.

After working inside your computer

About this task

After you complete any replacement procedure, ensure that you connect any external devices, cards, and cables before turning on your

computer.

Steps

1 Connect any telephone or network cables to your computer.

CAUTION: To connect a network cable, rst plug the cable into the network device and then plug it into the

computer.

2 Connect your computer and all attached devices to their electrical outlets.

3 Turn on your computer.

4 If required, verify that the computer works correctly by running ePSA diagnostics.

Working on your computer 9

Technology and components

NOTE: Instructions provided in this section are applicable on computers shipped with Windows 10 operating system. Windows 10

is factory-installed with this computer.

Topics:

• DDR4

• USB features

• USB Type-C

• HDMI 1.4

• USB features

• Power button LED behavior

DDR4

DDR4 (double data rate fourth generation) memory is a higher-speed successor to the DDR2 and DDR3 technologies and allows up to 512

GB in capacity, compared to the DDR3's maximum of 128 GB per DIMM. DDR4 synchronous dynamic random-access memory is keyed

dierently from both SDRAM and DDR to prevent the user from installing the wrong type of memory into the system.

DDR4 needs 20 percent less or just 1.2 volts, compared to DDR3 which requires 1.5 volts of electrical power to operate. DDR4 also supports

a new, deep power-down mode that allows the host device to go into standby without needing to refresh its memory. Deep power-down

mode is expected to reduce standby power consumption by 40 to 50 percent.

DDR4 Details

There are subtle dierences between DDR3 and DDR4 memory modules, as listed below.

Key notch dierence

The key notch on a DDR4 module is in a dierent location from the key notch on a DDR3 module. Both notches are on the insertion edge

but the notch location on the DDR4 is slightly dierent, to prevent the module from being installed into an incompatible board or platform.

Figure 1. Notch dierence

Increased thickness

DDR4 modules are slightly thicker than DDR3, to accommodate more signal layers.

10 Technology and components

Figure 2. Thickness dierence

Curved edge

DDR4 modules feature a curved edge to help with insertion and alleviate stress on the PCB during memory installation.

Figure 3. Curved edge

Memory Errors

Memory errors on the system display the new ON-FLASH-FLASH or ON-FLASH-ON failure code. If all memory fails, the LCD does not

turn on. Troubleshoot for possible memory failure by trying known good memory modules in the memory connectors on the bottom of the

system or under the keyboard, as in some portable systems.

NOTE: The DDR4 memory is imbedded in board and not a replaceable DIMM as shown and referred.

USB features

Universal Serial Bus, or USB, was introduced in 1996. It dramatically simplied the connection between host computers and peripheral

devices like mice, keyboards, external drivers, and printers.

Let's take a quick look on the USB evolution referencing to the table below.

Table 1. USB evolution

Type Data Transfer Rate Category Introduction Year

USB 2.0 480 Mbps High Speed 2000

USB 3.0/USB 3.1 Gen 1 5 Gbps Super Speed 2010

USB 3.1 Gen 2 10 Gbps Super Speed 2013

USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)

For years, the USB 2.0 has been rmly entrenched as the de facto interface standard in the PC world with about 6 billion devices sold, and

yet the need for more speed grows by ever faster computing hardware and ever greater bandwidth demands. The USB 3.0/USB 3.1 Gen 1

Technology and components 11

nally has the answer to the consumers' demands with a theoretically 10 times faster than its predecessor. In a nutshell, USB 3.1 Gen 1

features are as follows:

• Higher transfer rates (up to 5 Gbps)

• Increased maximum bus power and increased device current draw to better accommodate power-hungry devices

• New power management features

• Full-duplex data transfers and support for new transfer types

• Backward USB 2.0 compatibility

• New connectors and cable

The topics below cover some of the most commonly asked questions regarding USB 3.0/USB 3.1 Gen 1.

Speed

Currently, there are 3 speed modes dened by the latest USB 3.0/USB 3.1 Gen 1 specication. They are Super-Speed, Hi-Speed and Full-

Speed. The new SuperSpeed mode has a transfer rate of 4.8Gbps. While the specication retains Hi-Speed, and Full-Speed USB mode,

commonly known as USB 2.0 and 1.1 respectively, the slower modes still operate at 480Mbps and 12Mbps respectively and are kept to

maintain backward compatibility.

USB 3.0/USB 3.1 Gen 1 achieves the much higher performance by the technical changes below:

• An additional physical bus that is added in parallel with the existing USB 2.0 bus (refer to the picture below).

• USB 2.0 previously had four wires (power, ground, and a pair for dierential data); USB 3.0/USB 3.1 Gen 1 adds four more for two pairs

of dierential signals (receive and transmit) for a combined total of eight connections in the connectors and cabling.

• USB 3.0/USB 3.1 Gen 1 utilizes the bidirectional data interface, rather than USB 2.0's half-duplex arrangement. This gives a 10-fold

increase in theoretical bandwidth.

With today's ever increasing demands placed on data transfers with high-denition video content, terabyte storage devices, high megapixel

count digital cameras etc., USB 2.0 may not be fast enough. Furthermore, no USB 2.0 connection could ever come close to the 480Mbps

theoretical maximum throughput, making data transfer at around 320Mbps (40MB/s) — the actual real-world maximum. Similarly, USB

3.0/USB 3.1 Gen 1 connections will never achieve 4.8Gbps. We will likely see a real-world maximum rate of 400MB/s with overheads. At this

speed, USB 3.0/USB 3.1 Gen 1 is a 10x improvement over USB 2.0.

12 Technology and components

Applications

USB 3.0/USB 3.1 Gen 1 opens up the laneways and provides more headroom for devices to deliver a better overall experience. Where USB

video was barely tolerable previously (both from a maximum resolution, latency, and video compression perspective), it's easy to imagine

that with 5-10 times the bandwidth available, USB video solutions should work that much better. Single-link DVI requires almost 2Gbps

throughput. Where 480Mbps was limiting, 5Gbps is more than promising. With its promised 4.8Gbps speed, the standard will nd its way

into some products that previously weren't USB territory, like external RAID storage systems.

Listed below are some of the available SuperSpeed USB 3.0/USB 3.1 Gen 1 products:

• External Desktop USB 3.0/USB 3.1 Gen 1 Hard Drives

• Portable USB 3.0/USB 3.1 Gen 1 Hard Drives

• USB 3.0/USB 3.1 Gen 1 Drive Docks & Adapters

• USB 3.0/USB 3.1 Gen 1 Flash Drives & Readers

• USB 3.0/USB 3.1 Gen 1 Solid-state Drives

• USB 3.0/USB 3.1 Gen 1 RAIDs

• Optical Media Drives

• Multimedia Devices

• Networking

• USB 3.0/USB 3.1 Gen 1 Adapter Cards & Hubs

Compatibility

The good news is that USB 3.0/USB 3.1 Gen 1 has been carefully planned from the start to peacefully co-exist with USB 2.0. First of all,

while USB 3.0/USB 3.1 Gen 1 species new physical connections and thus new cables to take advantage of the higher speed capability of

the new protocol, the connector itself remains the same rectangular shape with the four USB 2.0 contacts in the exact same location as

before. Five new connections to carry receive and transmitted data independently are present on USB 3.0/USB 3.1 Gen 1 cables and only

come into contact when connected to a proper SuperSpeed USB connection.

Windows 8/10 will be bringing native support for USB 3.1 Gen 1 controllers. This is in contrast to previous versions of Windows, which

continue to require separate drivers for USB 3.0/USB 3.1 Gen 1 controllers.

Microsoft announced that Windows 7 would have USB 3.1 Gen 1 support, perhaps not on its immediate release, but in a subsequent Service

Pack or update. It is not out of the question to think that following a successful release of USB 3.0/USB 3.1 Gen 1 support in Windows 7,

SuperSpeed support would trickle down to Vista. Microsoft has conrmed this by stating that most of their partners share the opinion that

Vista should also support USB 3.0/USB 3.1 Gen 1.

USB Type-C

USB Type-C is a new, tiny physical connector. The connector itself can support various exciting new USB standards like USB 3.1 and USB

power delivery (USB PD).

Alternate Mode

USB Type-C is a new connector standard that is very small. It is about a third the size of an old USB Type-A plug. This is a single connector

standard that every device should be able to use. USB Type-C ports can support a variety of dierent protocols using “alternate modes,”

which allows you to have adapters that can output HDMI, VGA, DisplayPort, or other types of connections from that single USB port

Technology and components 13

USB Power Delivery

The USB PD specication is also closely intertwined with USB Type-C. Currently, smartphones, tablets, and other mobile devices often use

a USB connection to charge. A USB 2.0 connection provides up to 2.5 watts of power — that'll charge your phone, but that's about it. A

laptop might require up to 60 watts, for example. The USB Power Delivery specication ups this power delivery to 100 watts. It's bi-

directional, so a device can either send or receive power. And this power can be transferred at the same time the device is transmitting

data across the connection.

This could spell the end of all those proprietary laptop charging cables, with everything charging via a standard USB connection. You could

charge your laptop from one of those portable battery packs you charge your smartphones and other portable devices from today. You

could plug your laptop into an external display connected to a power cable, and that external display would charge your laptop as you used

it as an external display — all via the one little USB Type-C connection. To use this, the device and the cable have to support USB Power

Delivery. Just having a USB Type-C connection doesn't necessarily mean they do.

USB Type-C and USB 3.1

USB 3.1 is a new USB standard. USB 3's theoretical bandwidth is 5 Gbps, while USB 3.1's is 10 Gbps. That's double the bandwidth, as fast

as a rst-generation Thunderbolt connector. USB Type-C isn't the same thing as USB 3.1. USB Type-C is just a connector shape, and the

underlying technology could just be USB 2 or USB 3.0. In fact, Nokia's N1 Android tablet uses a USB Type-C connector, but underneath it's

all USB 2.0 — not even USB 3.0. However, these technologies are closely related.

Thunderbolt over USB Type-C

Thunderbolt is a hardware interface that combines data, video, audio, and power in a single connection. Thunderbolt combines PCI Express

(PCIe) and DisplayPort (DP) into one serial signal, and additionally provides DC power, all in one cable. Thunderbolt 1 and Thunderbolt 2 use

the same connector as miniDP (DisplayPort) to connect to peripherals, while Thunderbolt 3 uses a USB Type-C connector.

Figure 4. Thunderbolt 1 and Thunderbolt 3

1 Thunderbolt 1 and Thunderbolt 2 (using a miniDP connector)

2 Thunderbolt 3 (using a USB Type-C connector)

Thunderbolt 3 over USB Type-C

Thunderbolt 3 brings Thunderbolt to USB Type-C at speeds up to 40 Gbps, creating one compact port that does it all - delivering the

fastest, most versatile connection to any dock, display or data device like an external hard drive. Thunderbolt 3 uses a USB Type-C

connector/port to connect to supported peripherals.

1 Thunderbolt 3 uses USB Type-C connector and cables - It is compact and reversible

14 Technology and components

2 Thunderbolt 3 supports speed up to 40 Gbps

3 DisplayPort 1.2 – compatible with existing DisplayPort monitors, devices and cables

4 USB Power Delivery - Up to 130W on supported computers

Key Features of Thunderbolt 3 over USB Type-C

1 Thunderbolt, USB, DisplayPort and power on USB Type-C on a single cable (features vary between dierent products)

2 USB Type-C connector and cables which are compact and reversible

3 Supports Thunderbolt Networking (*varies between dierent products)

4 Supports up to 4K displays

5 Up to 40 Gbps

NOTE: Data transfer speed may vary between dierent devices.

Thunderbolt Icons

Figure 5. Thunderbolt Iconography Variations

HDMI 1.4

This topic explains the HDMI 1.4 and its features along with the advantages.

HDMI (High-Denition Multimedia Interface) is an industry-supported, uncompressed, all-digital audio/video interface. HDMI provides an

interface between any compatible digital audio/video source, such as a DVD player, or A/V receiver and a compatible digital audio and/or

video monitor, such as a digital TV (DTV). The intended applications for HDMI TVs, and DVD players. The primary advantage is cable

reduction and content protection provisions. HDMI supports standard, enhanced, or high-denition video, plus multichannel digital audio on

a single cable.

NOTE: The HDMI 1.4 will provide 5.1 channel audio support.

HDMI 1.4 Features

•HDMI Ethernet Channel - Adds high-speed networking to an HDMI link, allowing users to take full advantage of their IP-enabled

devices without a separate Ethernet cable

•Audio Return Channel - Allows an HDMI-connected TV with a built-in tuner to send audio data "upstream" to a surround audio system,

eliminating the need for a separate audio cable

•3D - Denes input/output protocols for major 3D video formats, paving the way for true 3D gaming and 3D home theater applications

•Content Type - Real-time signaling of content types between display and source devices, enabling a TV to optimize picture settings

based on content type

•Additional Color Spaces - Adds support for additional color models used in digital photography and computer graphics

•4K Support - Enables video resolutions far beyond 1080p, supporting next-generation displays that will rival the Digital Cinema systems

used in many commercial movie theaters

•HDMI Micro Connector - A new, smaller connector for phones and other portable devices, supporting video resolutions up to 1080p

•Automotive Connection System - New cables and connectors for automotive video systems, designed to meet the unique demands of

the motoring environment while delivering true HD quality

Technology and components 15

Advantages of HDMI

• Quality HDMI transfers uncompressed digital audio and video for the highest, crispest image quality.

• Low -cost HDMI provides the quality and functionality of a digital interface while also supporting uncompressed video formats in a

simple, cost-eective manner

• Audio HDMI supports multiple audio formats from standard stereo to multichannel surround sound

• HDMI combines video and multichannel audio into a single cable, eliminating the cost, complexity, and confusion of multiple cables

currently used in A/V systems

• HDMI supports communication between the video source (such as a DVD player) and the DTV, enabling new functionality

USB features

Universal Serial Bus, or USB, was introduced in 1996. It dramatically simplied the connection between host computers and peripheral

devices like mice, keyboards, external drivers, and printers.

Let's take a quick look on the USB evolution referencing to the table below.

Table 2. USB evolution

Type Data Transfer Rate Category Introduction Year

USB 2.0 480 Mbps High Speed 2000

USB 3.0/USB 3.1 Gen 1 5 Gbps Super Speed 2010

USB 3.1 Gen 2 10 Gbps Super Speed 2013

USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)

For years, the USB 2.0 has been rmly entrenched as the de facto interface standard in the PC world with about 6 billion devices sold, and

yet the need for more speed grows by ever faster computing hardware and ever greater bandwidth demands. The USB 3.0/USB 3.1 Gen 1

nally has the answer to the consumers' demands with a theoretically 10 times faster than its predecessor. In a nutshell, USB 3.1 Gen 1

features are as follows:

• Higher transfer rates (up to 5 Gbps)

• Increased maximum bus power and increased device current draw to better accommodate power-hungry devices

• New power management features

• Full-duplex data transfers and support for new transfer types

• Backward USB 2.0 compatibility

• New connectors and cable

The topics below cover some of the most commonly asked questions regarding USB 3.0/USB 3.1 Gen 1.

Speed

Currently, there are 3 speed modes dened by the latest USB 3.0/USB 3.1 Gen 1 specication. They are Super-Speed, Hi-Speed and Full-

Speed. The new SuperSpeed mode has a transfer rate of 4.8Gbps. While the specication retains Hi-Speed, and Full-Speed USB mode,

16 Technology and components

commonly known as USB 2.0 and 1.1 respectively, the slower modes still operate at 480Mbps and 12Mbps respectively and are kept to

maintain backward compatibility.

USB 3.0/USB 3.1 Gen 1 achieves the much higher performance by the technical changes below:

• An additional physical bus that is added in parallel with the existing USB 2.0 bus (refer to the picture below).

• USB 2.0 previously had four wires (power, ground, and a pair for dierential data); USB 3.0/USB 3.1 Gen 1 adds four more for two pairs

of dierential signals (receive and transmit) for a combined total of eight connections in the connectors and cabling.

• USB 3.0/USB 3.1 Gen 1 utilizes the bidirectional data interface, rather than USB 2.0's half-duplex arrangement. This gives a 10-fold

increase in theoretical bandwidth.

With today's ever increasing demands placed on data transfers with high-denition video content, terabyte storage devices, high megapixel

count digital cameras etc., USB 2.0 may not be fast enough. Furthermore, no USB 2.0 connection could ever come close to the 480Mbps

theoretical maximum throughput, making data transfer at around 320Mbps (40MB/s) — the actual real-world maximum. Similarly, USB

3.0/USB 3.1 Gen 1 connections will never achieve 4.8Gbps. We will likely see a real-world maximum rate of 400MB/s with overheads. At this

speed, USB 3.0/USB 3.1 Gen 1 is a 10x improvement over USB 2.0.

Applications

USB 3.0/USB 3.1 Gen 1 opens up the laneways and provides more headroom for devices to deliver a better overall experience. Where USB

video was barely tolerable previously (both from a maximum resolution, latency, and video compression perspective), it's easy to imagine

that with 5-10 times the bandwidth available, USB video solutions should work that much better. Single-link DVI requires almost 2Gbps

throughput. Where 480Mbps was limiting, 5Gbps is more than promising. With its promised 4.8Gbps speed, the standard will nd its way

into some products that previously weren't USB territory, like external RAID storage systems.

Listed below are some of the available SuperSpeed USB 3.0/USB 3.1 Gen 1 products:

• External Desktop USB 3.0/USB 3.1 Gen 1 Hard Drives

• Portable USB 3.0/USB 3.1 Gen 1 Hard Drives

• USB 3.0/USB 3.1 Gen 1 Drive Docks & Adapters

• USB 3.0/USB 3.1 Gen 1 Flash Drives & Readers

• USB 3.0/USB 3.1 Gen 1 Solid-state Drives

• USB 3.0/USB 3.1 Gen 1 RAIDs

• Optical Media Drives

• Multimedia Devices

• Networking

• USB 3.0/USB 3.1 Gen 1 Adapter Cards & Hubs

Technology and components 17

Compatibility

The good news is that USB 3.0/USB 3.1 Gen 1 has been carefully planned from the start to peacefully co-exist with USB 2.0. First of all,

while USB 3.0/USB 3.1 Gen 1 species new physical connections and thus new cables to take advantage of the higher speed capability of

the new protocol, the connector itself remains the same rectangular shape with the four USB 2.0 contacts in the exact same location as

before. Five new connections to carry receive and transmitted data independently are present on USB 3.0/USB 3.1 Gen 1 cables and only

come into contact when connected to a proper SuperSpeed USB connection.

Windows 10 will be bringing native support for USB 3.1 Gen 1 controllers. This is in contrast to previous versions of Windows, which

continue to require separate drivers for USB 3.0/USB 3.1 Gen 1 controllers.

Power button LED behavior

On certain Dell Latitude systems, the power button LED is used to provide an indication of the system status, and as a result the power

button illuminates when pressed. The systems with the optional power button/ngerprint reader will have no LED under the power button

and hence will apply the available LED's in the system to provide an indication of the system status.

Power button LED behavior without Fingerprint reader

• System is ON (S0) = LED illuminates solid white.

• System in Sleep/Standby (S3, SOix) = LED is o

• System is O/Hibernating (S4/S5) = LED is o

Power On and LED behavior with Fingerprint reader

• Pressing the power button for a duration between 50 msec to 2 sec turns on the device.

• Power button does not register additional presses until the SOL (Sign-Of-Life) has been provided to the user.

• System LED's illuminates upon pressing the power button.

• All the available LED's (Keyboard backlit/ Keyboard caps lock LED/ Battery Charge LED) illuminates and displays specied behavior.

• The auditory tone is O by default. It can be enabled in the BIOS setup.

• Safeguards do not time out if the device gets hung during the logon process.

• Dell logo: Turns on within 2 secs after pressing the power button.

• Full boot: Within 22 secs after pressing the power button.

• Below is the example timelines:

18 Technology and components

Power button with ngerprint reader will have no LED and will leverage the available LED's in the system to provide indication of the system

status

•Power Adapter LED:

– The LED on Power adapter connector illuminates white when power is supplied from electrical outlet.

•Battery Indicator LED:

– If the computer is connected to an electrical outlet, the battery light operates as follows:

1 Solid white -the battery is charging. When the charge is complete the LED turns o.

– If the computer is running on a battery, the battery light operates as follows:

1O -the battery is adequately charged (or the computer is turned o).

2 Solid amber -the battery charge is critically low. A low battery state is approximately 30 minutes or less of battery life

remaining.

•Camera LED

– White LED activates when camera is on.

•Mic Mute LED:

– When activated (muted), the mic mute LED on the F4 Key should illuminate WHITE.

•RJ45 LEDs:

–

Table 3. LED on either side of RJ45 port

Link speed indicator (LHS) Activity indicator (RHS)

Green Amber

Technology and components 19

Disassembly and reassembly

Base cover

Removing the base cover

Prerequisite

1 Follow the procedure in Before working inside your computer.

About this task

The gure indicates the location of the base cover and provides a visual representation of the removal procedure.

20 Disassembly and reassembly

Disassembly and reassembly 21

Steps

1 Remove the ve (M2.5x6.3) and three (M2.5x8) captive screws that secure the base cover to the computer.

2 Pry the base cover starting from the right hinge and work your way around.

3 Lift the base cover away from the computer.

Installing the base cover

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the base cover and provides a visual representation of the installation procedure.

22 Disassembly and reassembly

Disassembly and reassembly 23

Steps

1 Place the base cover on the palm-rest and keyboard assembly, and snap the base cover into place.

2 Replace the ve (M2.5x6.3) and three (M2.5x8) captive screws to secure the base cover to the computer.

Next step

1 Follow the procedure in After working inside your computer.

Battery

Lithium-ion battery precautions

CAUTION:

• Exercise caution when handling Lithium-ion batteries.

• Discharge the battery as much as possible before removing it from the system. This can be done by disconnecting the AC adapter

from the system to allow the battery to drain.

• Do not crush, drop, mutilate, or penetrate the battery with foreign objects.

• Do not expose the battery to high temperatures, or disassemble battery packs and cells.

• Do not apply pressure to the surface of the battery.

• Do not bend the battery.

• Do not use tools of any kind to pry on or against the battery.

• Ensure any screws during the servicing of this product are not lost or misplaced, to prevent accidental puncture or damage to the

battery and other system components.

• If a battery gets stuck in a device as a result of swelling, do not try to free it as puncturing, bending, or crushing a Lithium-ion

battery can be dangerous. In such an instance, contact for assistance and further instructions.

• If the battery gets stuck inside your computer as a result of swelling, do not try to release it as puncturing, bending, or crushing a

lithium-ion battery can be dangerous. In such an instance, contact Dell technical support for assistance. See https://www.dell.com/

support.

• Always purchase genuine batteries from https://www.dell.com or authorized Dell partners and resellers.

Removing the battery

Prerequisite

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

About this task

The gure indicates the location of the battery and provides a visual representation of the removal procedure.

24 Disassembly and reassembly

Steps

1 Disconnect the battery cable from the system board.

2 Remove the single (M2x6) captive screw that secures the battery computer.

3 Lift the battery o the computer.

Installing the battery

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the battery and provides a visual representation of the installation procedure.

Disassembly and reassembly 25

Steps

1 Place the battery on the palm-rest and keyboard assembly and align the screw holes on the battery with the screw holes on the palm-

rest and keyboard assembly.

2 Replace the single (M2x6) captive screw that secures the battery to the computer.

3 Connect the battery cable to the system board.

Next steps

1 Install the base cover.

2 Follow the procedure in After working inside your computer.

Memory modules

Removing the memory modules

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

About this task

The gure indicates the location of the memory module and provides a visual representation of the removal procedure.

26 Disassembly and reassembly

Steps

1 Using your nger tips gently spread apart the securing-clips on each end of the memory-module slot until the memory module pops

up.

2 Slide and remove the memory module o the memory module slot on the system board.

Installing the memory modules

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the memory module and provides a visual representation of the installation procedure.

Disassembly and reassembly 27

Steps

1 Align the notch on the memory module with the tab on the memory-module slot.

2 Slide the memory module rmly into the slot at an angle.

3 Press the memory module down until it clicks into place.

NOTE: If you do not hear the click, remove the memory module and reinstall it.

Next step

1 Install the battery.

2 Install the base cover.

3 Follow the procedure in After working inside your computer.

WLAN card

Removing the WLAN card

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

About this task

The gure indicates the location of the WLAN card and provides a visual representation of the removal procedure.

28 Disassembly and reassembly

Steps

1 Locate the WLAN card on your computer.

2 Remove the single (M2x3) screw that secures the WLAN bracket.

3 Remove the WLAN bracket from the computer.

4 Disconnect the WLAN cables from the WLAN module.

5 Remove the WLAN card out of the computer.

Installing the WLAN card

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the WLAN card and provides a visual representation of the installation procedure.

Disassembly and reassembly 29

Steps

1 Locate the WLAN card slot on your computer.

2 Slide the WLAN card into the slot on the system board.

3 Reconnect the WLAN card cables to the WLAN module.

4 Place the WLAN bracket on the WLAN card and secure it with the single (M2x3) screw.

Next step

1 Install the battery.

2 Install the base cover.

3 Follow the procedure in After working inside your computer.

WWAN card

Removing the WWAN

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

30 Disassembly and reassembly

About this task

The gure indicates the location of the WWAN card and provides a visual representation of the removal procedure.

Steps

1 Locate the WWAN on your computer.

2 Remove the single (M2x3) screw that secures the WWAN metal bracket to the computer.

3 Lift the WWAN metal bracket away from the computer.

4 Disconnect the WWAN cables from the WWAN card module.

5 Slide the WWAN card out of the system.

Installing the WWAN

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the WWAN card and provides a visual representation of the installation procedure.

Disassembly and reassembly 31

Steps

1 Locate the WWAN slot on your computer.

2 Slide the WWAN card into the slot on your computer.

3 Reconnect the WWAN cables to the WWAN card module.

4 Place the WWAN metal bracket on the WWAN card module.

5 Replace the single (M2x3) screw to secure the module to the computer.

Next step

1 Install the battery.

2 Install the base cover.

3 Follow the procedure in After working inside your computer.

Hard disk drive

Removing the Hard drive

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

32 Disassembly and reassembly

3 Remove the battery.

About this task

The gure indicates the location of the HDD and provides a visual representation of the removal procedure.

Steps

1 Locate the HDD on your computer.

2 Disconnect the HDD cable from the system board.

3 Remove the four (M2x2.7) screws that secure the HDD to the system board.

4 Remove the HDD from the computer.

Installing the Hard drive

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the HDD and provides a visual representation of the installation procedure.

Disassembly and reassembly 33

Steps

1 Locate the system board slot on your computer.

2 Align and install the HDD into the computer

3 Install the four (M2x2.7) screws that secure the HDD to the computer.

4 Connect the HDD cable on to the connector on the system board.

Next step

1 Install the battery.

2 Install the base cover.

3 Follow the procedure in After working inside your computer.

Coin-cell battery

Removing the Coin-cell

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

About this task

The gure indicates the location of the Coin-cell and provides a visual representation of the removal procedure.

34 Disassembly and reassembly

Steps

1 Locate the Coin-cell on your computer.

2 Disconnect the coin-cell cable from the system board.

3 Lift the coin-cell out of the computer.

Installing the Coin-cell

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the coin-cell and provides a visual representation of the installation procedure.

Disassembly and reassembly 35

Steps

1 Locate the coin-cell slot on your computer.

2 Adhere the coin-cell on to the slot.

3 Reconnect the coin-cell cable to the system board.

Next step

1 Install the battery.

2 Install the base cover.

3 Follow the procedure in After working inside your computer.

DC-in port

Removing the DC-in

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the heat sink (for discrete only).

About this task

The gure indicates the location of the DC-in and provides a visual representation of the removal procedure.

36 Disassembly and reassembly

Steps

1 Locate the DC-in port on your computer.

2 Remove the two (M2x5) that secure the DC-in metal bracket.

3 Lift the DC-in metal bracket from the computer.

4 Disconnect the DC-in cable from the system board.

5 Remove the DC-in port from the computer.

Installing the DC-in

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the DC-in and provides a visual representation of the installation procedure.

Disassembly and reassembly 37

Steps

1 Locate the DC-in slot on your computer.

2 Insert the DC-in port into the slot on your computer.

3 Connect the DC-in cable to the system board.

4 Place the DC-in metal bracket on the DC-in port.

5 Install the two screws (M2x5) that secure the DC-in metal bracket to the system board.

Next step

1 Install theheat sink (for discrete only).

2 Install the battery.

3 Install the base cover.

4 Follow the procedure in After working inside your computer.

Solid state drive

Removing the SSD

Prerequisites

1 Follow the procedure in Before working inside your computer.

38 Disassembly and reassembly

2 Remove the base cover.

3 Remove the battery.

About this task

The gure indicates the location of the SSD and provides a visual representation of the removal procedure.

Steps

1 Locate the SSD on your computer.

2 Remove two (M2x3) screws that secure the SSD module to the computer.

3 Remove the SSD thermal plate and slide the SSD out of the computer.

Installing the SSD

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the SSD and provides a visual representation of the installation procedure.

Disassembly and reassembly 39

Steps

1 Locate the SSD slot on your computer.

2 Slide the SSD into the slot.

3 Place the SSD thermal plate over the SSD module.

4 Replace the two (M2x3) screws to secure the SSD module to the computer.

Next step

1 Install the battery.

2 Install the base cover.

3 Follow the procedure in After working inside your computer.

Inner frame

Removing the inner frame

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the solid state drive.

5 Remove the HDD.

6 Remove the WLAN card.

7 Remove the WWAN card.

About this task

The gure indicates the location of the inner frame and provides a visual representation of the removal procedure.

40 Disassembly and reassembly

Steps

1 Locate the system board on your computer.

2 Unroute the WWAN and WLAN card cables from the routing clips.

Disassembly and reassembly 41

3 Disconnect and unroute the speaker cable.

4 Remove the ve (M2x5) and six (M2x3) screws that secure the inner frame to the computer.

5 Lift the inner frame out of the computer.

Installing the inner frame

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the inner frame and provides a visual representation of the installation procedure.

42 Disassembly and reassembly

Steps

1 Locate the Inner frame slot on your computer.

2 Align and place the inner frame into the slot on your computer.

Disassembly and reassembly 43

3 Install the ve (M2x5) and six (M2x3) that secure the inner frame to the computer.

4 Route the WWAN and WLAN card cable through the retention clips on the frame.

5 Route the Speaker through the retention clips and connect it to the system board.

Next step

1 Install the WWAN card.

2 Install the WLAN card.

3 Install the HDD.

4 Install the solid state drive.

5 Install the battery.

6 Install the base cover.

7 Follow the procedure in After working inside your computer.

Touchpad buttons

Removing the touchpad buttons

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the solid state drive.

5 Remove the HDD.

6 Remove the WLAN card.

7 Remove the WWAN card.

8 Remove the inner frame.

About this task

The gure indicates the location of the touchpad buttons and provides a visual representation of the removal procedure.

44 Disassembly and reassembly

Steps

1 Locate the touchpad buttons board on your computer.

2 Open the latch and disconnect the smart card reader board cable from the system board.

3 Open the latch and disconnect the touchpad buttons cable from the connector.

4 Remove the two (M2x3) screws that secure the touchpad buttons to the palmrest.

5 Lift the touchpad buttons out of the computer.

Installing the touchpad buttons

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the touchpad buttons and provides a visual representation of the installation procedure.

Disassembly and reassembly 45

Steps

1 Locate the touchpad buttons slot on your computer.

2 Align and place the touchpad buttons into the slot on your computer.

3 Connect the touchpad buttons cable to the connector on the computer and secure the latch.

4 Install the two (M2x3) screws to secure the touchpad buttons on to the computer.

5 Connect the smart card reader cable to its connector and secure the latch.

Next step

1 Install the inner frame.

2 Install the WWAN card.

3 Install the WLAN card.

4 Install the HDD.

5 Install the solid state drive.

6 Install the battery.

7 Install the base cover.

8 Follow the procedure in After working inside your computer.

SmartCard reader

Removing the smart card reader board

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

46 Disassembly and reassembly

3 Remove the battery.

4 Remove the solid state drive.

5 Remove the HDD.

6 Remove the WLAN card.

7 Remove the WWAN card.

8 Remove the inner frame.

About this task

The gure indicates the location of the smart card reader board and provides a visual representation of the removal procedure.

Steps

1 Locate the Smart card reader board on your computer.

2 Open the latch and disconnect the Smart card reader board cable from the system board.

3 Remove the four (M2X3) screws that secure the smart card reader board to the computer.

4 Lift the smart card reader module out of the computer.

Disassembly and reassembly 47

Installing the smart card reader board

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the smart card reader board and provides a visual representation of the installation procedure.

Steps

1 Locate the smart card reader board slot on your computer.

2 Align and place the smart card reader board into the slot on your computer.

3 Install the four (M2X3) screws that secure the smart card reader board to the computer.

4 Connect the smart card reader cable on to the connector on the system board and lock the latch.

Next step

1 Install the inner frame.

48 Disassembly and reassembly

2 Install the WWAN card.

3 Install the WLAN card.

4 Install the HDD.

5 Install the solid state drive.

6 Install the battery.

7 Install the base cover.

8 Follow the procedure in After working inside your computer.

Touchpad buttons

Removing the touchpad buttons

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the solid state drive.

5 Remove the HDD.

6 Remove the WLAN card.

7 Remove the WWAN card.

8 Remove the inner frame.

About this task

The gure indicates the location of the touchpad buttons and provides a visual representation of the removal procedure.

Disassembly and reassembly 49

Steps

1 Locate the touchpad buttons board on your computer.

2 Open the latch and disconnect the smart card reader board cable from the system board.

3 Open the latch and disconnect the touchpad buttons cable from the connector.

4 Remove the two (M2x3) screws that secure the touchpad buttons to the palmrest.

5 Lift the touchpad buttons out of the computer.

Installing the touchpad buttons

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the touchpad buttons and provides a visual representation of the installation procedure.

Steps

1 Locate the touchpad buttons slot on your computer.

2 Align and place the touchpad buttons into the slot on your computer.

3 Connect the touchpad buttons cable to the connector on the computer and secure the latch.

4 Install the two (M2x3) screws to secure the touchpad buttons on to the computer.

5 Connect the smart card reader cable to its connector and secure the latch.

Next step

1 Install the inner frame.

2 Install the WWAN card.

50 Disassembly and reassembly

3 Install the WLAN card.

4 Install the HDD.

5 Install the solid state drive.

6 Install the battery.

7 Install the base cover.

8 Follow the procedure in After working inside your computer.

LED board

Removing the LED board

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the solid state drive.

5 Remove the HDD.

6 Remove the WLAN card.

7 Remove the WWAN card.

8 Remove the inner frame.

About this task

The gure indicates the location of the LED board and provides a visual representation of the removal procedure.

Disassembly and reassembly 51

Steps

1 Locate the LED board on your computer.

2 Open the latch and disconnect the LED board cable from the system board.

3 Peel back the LED board cable.

NOTE: The LED board cable is secured to the computer by an adhesive strip.

4 Remove the single (M2x3) screw that secures the LED board to the computer.

5 Lift the LED board out of the computer.

Installing the LED board

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the LED board and provides a visual representation of the installation procedure.

52 Disassembly and reassembly

Steps

1 Locate the LED board slot on your computer.

2 Align and place the LED board on the slot on your computer.

3 Install the single (M2x3) screw that secures the LED board to the computer.

4 Adhere the LED board cable to the adhesive strip on the computer.

5 Connect the LED board cable to the connector on the system board.

Next step

1 Install the inner frame.

2 Install the WWAN card.

3 Install the WLAN card.

4 Install the HDD.

5 Install the solid state drive.

6 Install the battery.

7 Install the base cover.

8 Follow the procedure in After working inside your computer.

Disassembly and reassembly 53

Speakers

Removing the speakers

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the solid state drive.

5 Remove the HDD.

6 Remove the WLAN card.

7 Remove the WWAN card.

8 Remove the inner frame.

9 Remove the LED board.

About this task

The gure indicates the location of the speakers and provides a visual representation of the removal procedure.

54 Disassembly and reassembly

Steps

1 Locate the speakers on your computer.

2 Unroute the speaker cables from the retention clips on the computer.

3 Lift the speakers out of the computer.

Installing the speakers

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the speakers and provides a visual representation of the installation procedure.

Disassembly and reassembly 55

Steps

1 Locate the speakers slot on your computer.

2 Align and place the speakers in the slot on your computer.

3 Route the speaker cables through the retention clips on your computer.

Next step

1 Install the LED board.

2 Install the inner frame.

3 Install the WWAN card.

4 Install the WLAN card.

5 Install the HDD.

6 Install the solid state drive.

7 Install the battery.

8 Install the base cover.

9 Follow the procedure in After working inside your computer.

56 Disassembly and reassembly

Heatsink assembly-Discrete

Removing the heatsink assembly-discrete

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

About this task

The gure indicates the location of the Heatsink and provides a visual representation of the removal procedure.

Disassembly and reassembly 57

Steps

1 Locate the heatsink assembly on your computer.

2 Remove the two (M2x5) and six (M2x3) captive screws that secures the heatsink assembly to the computer.

3 Disconnect the heatsink fan cable from the system board.

4 Lift the heatsink assembly out of the computer.

5 Remove the single (M2x5) screw that secures the heatsink fan to the heatsink assembly.

6 Lift the heatsink fan from the heatsink assembly.

Installing the heatsink assembly-discrete

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the heatsink and provides a visual representation of the installation procedure.

58 Disassembly and reassembly

Disassembly and reassembly 59

Steps

1 Locate the heatsink slot on your computer.

2 Align and place the heatsink fan on to the heatsink assembly.

3 Install the single (M2x5) screw that secures the heatsink fan to the heatsink assembly.

4 Align and place the heatsink assembly into the slot of your computer.

5 Install the two (M2x5) and six (M2x3) to secure the heatsink assembly to the computer.

NOTE: Install the screws as per the callout on the heatsink.

6 Connect the heatsink fan cable on to the connector on the system board.

Next step

1 Install the battery.

2 Install the base cover.

3 Follow the procedure in After working inside your computer.

Heatsink assembly-UMA

60 Disassembly and reassembly

Removing the heatsink assembly-UMA

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

About this task

The gure indicates the location of the Heatsink assembly and provides a visual representation of the removal procedure.

Disassembly and reassembly 61

Steps

1 Locate the heatsink on your computer.

2 Remove the two (M2x5) and four (M2x3) that secures the heatsink assembly to the computer.

NOTE: Remove the screws as per the callout on the heatsink module.

3 Disconnect the heatsink fan cable from the system board.

4 Lift the heatsink assembly out of the computer.

5 Remove the single (M2x5) screw that secures the heatsink fan to the heatsink assembly.

6 Lift the heatsink fan from the heatsink assembly.

Installing the heatsink assembly-UMA

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the heatsink assembly and provides a visual representation of the installation procedure.

62 Disassembly and reassembly

Disassembly and reassembly 63

Steps

1 Locate the heatsink slot on your computer.

2 Align and place the heatsink fan on to the heatsink assembly.

3 Install the single (M2x5) screw that secures the heatsink fan to the heatsink assembly.

4 Align and place the heatsink assembly into the slot of your computer.

5 Install the two (M2x5) and four (M2x3) captive screws to secure the heatsink assembly to the computer.

NOTE: Install the screws as per the callout on the heatsink.

6 Connect the heatsink fan cable on to the connector on the system board.

Next step

1 Install the battery.

2 Install the base cover.

3 Follow the procedure in After working inside your computer.

64 Disassembly and reassembly

System board

Removing the system board

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the solid state drive.

5 Remove the HDD.

6 Remove the WLAN card.

7 Remove the WWAN card.

8 Remove the inner frame.

9 Remove the heat sink.

10 Remove the memory module.

About this task

The gure indicates the location of the system board and provides a visual representation of the removal procedure.

Disassembly and reassembly 65

66 Disassembly and reassembly

Steps

1 Locate the system board on your computer.

2 Remove the single (M2x3) screw that secures the ngerprint reader metal bracket.

3 Remove the ngerprint metal bracket from the computer and ip the ngerprint sensor over.

4 Disconnect the camera cable from the system board.

5 Remove the two screws that secure the EDP metal bracket.

6 Lift the EDP metal bracket from the computer.

7 Peel the tape that secures the display cable to the system board.

8 Open the latch and disconnect the display cable from the system board.

9 Disconnect the LED board cable, touchpad cable and the keyboard cable from the system board connector.

10 Remove the four (M2x4) screws that secure the system board to the palm-rest and keyboard assembly.

11 Lift the system board o the palm-rest and keyboard assembly.

Installing the system board

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the system board and provides a visual representation of the installation procedure.

Disassembly and reassembly 67

68 Disassembly and reassembly

Steps

1 Locate the system board slot on your computer.

2 Slide the ports on the system board into the slots on the palm-rest and keyboard assembly and align the screw holes on the system

board with the screw holes on the palm-rest and keyboard assembly.

3 Install the four (M2x4) screws that secure the system board to the palm-rest and keyboard assembly.

4 Align and place the ngerprint reader sensor on to the slot on the computer.

5 Place the nger print reader metal bracket over the nger print sensor.

6 Replace the single (M2x3) screw to secure the metal bracket to the computer.

7 Connect the display cable on to the connector on the system board.

8 Adhere the tape that secures the display board to the system board.

9 Install the two screws (M2x3) that secure the EDP metal bracket to the system board.

10 Connect the keyboard cable to the system board and close the latch to secure the cable.

11 Connect the touchpad cable to the system board and close the latch to secure the cable.

12 Connect the LED board cable to the system board.

Next step

1 Install the memory module.

2 Install the heat sink.

3 Install the inner frame.

4 Install the WWAN card.

5 Install the WLAN card.

6 Install the HDD.

7 Install the solid state drive.

8 Install the battery.

9 Install the base cover.

10 Follow the procedure in After working inside your computer.

Keyboard

Removing the Keyboard

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the solid state drive.

5 Remove the HDD.

6 Remove the WLAN card.

7 Remove the WWAN card.

8 Remove the inner frame.

9 Remove the memory module.

10 Remove the system board.

NOTE: System board can be removed with heatsink attached.

About this task

The gure indicates the location of the keyboard and provides a visual representation of the removal procedure.

Disassembly and reassembly 69

Steps

1 Locate the Keyboard on your computer.

2 Open the latch and disconnect the Keyboard, keyboard backlit cables from the palmrest.

3 Remove the 22 (M2x2) screws that secure the keyboard to the chassis of your computer.

4 Lift the keyboard out of the computer.

Installing the Keyboard

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the keyboard and provides a visual representation of the installation procedure.

70 Disassembly and reassembly

Steps

1 Locate the Keyboard slot on your computer.

2 Align and place the keyboard into the slot on your computer.

3 Install the 22 (M2x2) screws that secure the keyboard to the chassis of the computer.

4 Connect the keyboard, keyboard backlit cables on to the connector on the palmrest.

Next steps

1 Install the system board.

NOTE: System board can be removed with heatsink attached.

2 Install the memory module

3 Install the inner frame.

4 Install the WWAN card.

5 Install the WLAN card.

6 Install the HDD.

7 Install the solid state drive.

8 Install the battery.

9 Install the base cover.

10 Follow the procedure in After working inside your computer.

Disassembly and reassembly 71

Keyboard bracket

Removing the keyboard bracket

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the solid-state drive.

5 Remove the HDD.

6 Remove the WLAN card.

7 Remove the WWAN card.

8 Remove the inner frame.

9 Remove the memory module.

10 Remove the system board

NOTE: System board can be removed with heatsink attached.

11 Remove the keyboard.

About this task

The gure indicates the location of the keyboard bracket and provides a visual representation of the removal procedure.

72 Disassembly and reassembly

Steps

1 Locate the keyboard bracket on your computer.

2 Remove the eleven (M2x2) screws that secure the keyboard bracket to the keyboard assembly.

3 Lift the keyboard away from the keyboard bracket.

Installing the keyboard bracket

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the keyboard bracket and provides a visual representation of the installation procedure.

Steps

1 Locate the keyboard bracket slot on your computer.

2 Align and place the keyboard on the keyboard bracket.

3 Press down on the lattice at the snap points, in order to secure the keyboard assembly to the palmrest.

NOTE: The keyboard has multiple snap points on the lattice side which must be pushed down rmly after the keyboard

is replaced.

4 Install the eleven (M2x2) screws to secure the keyboard to the keyboard bracket.

Next steps

1 Install the keyboard.

2 Install the system board.

NOTE: System board can be removed with heatsink attached.

3 Install the memory module.

Disassembly and reassembly 73

4 Install the inner frame.

5 Install the WWAN card.

6 Install the WLAN card.

7 Install the HDD.

8 Install the solid state drive.

9 Install the battery.

10 Install the base cover.

11 Follow the procedure in After working inside your computer.

Power button

Removing the power button with ngerprint reader

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the solid state drive.

5 Remove the HDD.

6 Remove the WLAN card.

7 Remove the WWAN card.

8 Remove the inner frame.

9 Remove the memory module.

10 Remove the system board.

NOTE: The system board can be removed along with the heat sink.

About this task

The gure indicates the location of the power button with ngerprint reader and provides a visual representation of the removal procedure.

74 Disassembly and reassembly

Steps

1 Locate the power button with ngerprint reader on your computer.

2 Remove the two (M2x2) screws that secure the power button to chassis of your computer.

3 Lift the power button with ngerprint out of the computer.

Installing the power button with ngerprint

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the power button with ngerprint and provides a visual representation of the installation procedure.

Steps

1 Locate the power button with ngerprint slot on your computer.

2 Align and place the power button with ngerprint into the slot on your computer.

3 Install the two (M2x2) screws that secure the power button to chassis of your computer.

Next step

1 Install the system board.

2 Install the memory module.

3 Install the inner frame.

4 Install the WWAN card.

5 Install the WLAN card.

6 Install the HDD.

7 Install the solid state drive.

8 Install the battery.

9 Install the base cover.

10 Follow the procedure in After working inside your computer.

Disassembly and reassembly 75

Display assembly

Removing the display assembly

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the WLAN card.

5 Remove the WWAN card.

About this task

The gure indicates the location of the display assembly and provides a visual representation of the removal procedure.

76 Disassembly and reassembly

Disassembly and reassembly 77

78 Disassembly and reassembly

Steps

1 Locate the display cable, touchscreen cable and display hinges on your computer.

2 Peel back the tape and disconnect the touchscreen cable.

3 Remove the two (M2x3) screws that secure the EDP metal bracket to the computer.

4 Peel the tape that secures the display cable to the system board.

5 Open the latch and disconnect the display cable from the system board.

6 Unroute the WLAN and WWAN cables from the retention clips.

7 Remove the six (M2.5x4) screws that secure the display hinges to the chassis of your computer.

8 Open the display hinges at an angle of 90 degrees and slightly open the display.

9 Remove the palm-rest and keyboard assembly o the display assembly.

Installing the display assembly

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the component and provides a visual representation of the installation procedure.

Disassembly and reassembly 79

80 Disassembly and reassembly

Disassembly and reassembly 81

Steps

1 Place the display assembly on a clean and at surface.

2 Align and place the palm-rest and keyboard assembly on the display assembly.

3 Using the alignment posts, close the display hinges.

4 Connect the display cable to the system board and adhere the tape to secure the display cable.

5 Place the EDP metal bracket on the display cable connector.

6 Replace the two (M2x3) screw to secure the EDP metal bracket to the system board.

7 Connect the touchscreen cable to the connector on the system board.

8 Replace the six (M2.5x4) screws that secure the display hinge to the chassis of the computer.

9 Route the WWAN cable and the WLAN cable through the retention clips provided.

Next step

1 Install the WWAN card.

2 Install the WLAN card.

3 Install the battery.

4 Install the base cover.

5 Follow the procedure in After working inside your computer.

Display bezel

Removing the display bezel

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the WLAN card.

5 Remove the WWAN card.

6 Remove the display assembly.

About this task

The gure indicates the location of the display bezel and provides a visual representation of the removal procedure.

82 Disassembly and reassembly

Steps

1 Use a plastic scribe to pry open the bottom edge of the display bezel beginning from the recesses near the hinges.

2 Work your way around the edges of the display bezel to release it from the display back cover and antenna assembly.

3 Remove the display bezel o the display back-cover and antenna assembly.

Installing the display bezel

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the display bezel and provides a visual representation of the installation procedure.

Disassembly and reassembly 83

Step

Align the display bezel with the display back-cover and antenna assembly, and gently snap the display bezel into place.

Next step

1 Install the display assembly.

2 Install the WWAN card.

3 Install the WLAN card.

4 Install the battery.

5 Install the base cover.

6 Follow the procedure in After working inside your computer.

Hinge caps

Removing the hinge caps

Prerequisite

1 Follow the procedure in Before working inside your computer.

84 Disassembly and reassembly

2 Remove the base cover.

3 Remove the battery.

4 Remove the display assembly.

5 Remove the display bezel.

About this task

The gure indicates the location of the hinge caps and provides a visual representation of the removal procedure.

Steps

1 Locate the hinge cap on the display back cover.

2 Remove the two (M2x2.5) screws that secure the hinge caps to the chassis.

3 Pinch the hinge caps to release the hinge caps from the ribs on the display back cover and then slide inwards to remove the hinge

caps from the display hinge.

Installing the hinge caps

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the hinge caps and provides a visual representation of the installation procedure.

Disassembly and reassembly 85

Steps

1 Place the hinge caps and slide outward on the display hinges.

2 Replace the two (M2x2.5) screws to secure the hinge caps to the display hinge.

Next step

1 Install the display bezel.

2 Install the display assembly.

3 Install the WWAN card.

4 Install the WLAN card.

5 Install the battery.

6 Install the base cover.

7 Follow the procedure in After working inside your computer.

Display panel

Removing the display panel

Prerequisites

1 Follow the procedure in Before working inside your computer.

86 Disassembly and reassembly

2 Remove the base cover.

3 Remove the battery.

4 Remove the WLAN card.

5 Remove the WWAN card.

6 Remove the display assembly.

7 Remove the display bezel.

8 Remove the hinge caps.

About this task

The gure indicates the location of the display panel and provides a visual representation of the removal procedure.

Disassembly and reassembly 87

88 Disassembly and reassembly

Steps

1 Locate the display panel on the display back cover assembly.

2 Remove the four (M2.5x3.5) screws that secure the display panel to the display assembly.

3 Lift to turn over the display panel to access the display cable.

4 Peel the conductive tape on the display cable connector.

5 Lift the latch and disconnect the display cable from the connector on the display panel.

NOTE: Do not pull and release the Stretch (SR) Tapes from the display panel. There is no need to separate the brackets

from the display panel.

Installing the display panel

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the display panel and provides a visual representation of the installation procedure.

Disassembly and reassembly 89

90 Disassembly and reassembly

Steps

1 Connect the display cable to the connector and close the latch.

2 Adhere the adhesive strip to secure the display cable connector.

3 Adhere the conductive tape to secure the display cable connector.

4 Replace the four (M2.5x3.5) screws that secure the display panel to the display assembly.

Next step

1 Install the hinge caps.

2 Install the display bezel.

3 Install the display assembly.

4 Install the WWAN card.

5 Install the WLAN card.

6 Install the battery.

7 Install the base cover.

8 Follow the procedure in After working inside your computer.

Palmrest assembly

Removing the palm-rest and keyboard assembly

Prerequisites

1 Follow the procedure in Before working inside your computer.

2 Remove the base cover.

3 Remove the battery.

4 Remove the solid state drive.

5 Remove the HDD.

6 Remove the WLAN card.

7 Remove the WWAN card.

8 Remove the inner frame.

9 Remove the memory module.

10 Remove the LED board.

11 Remove the speakers.

12 Remove the display assembly.

13 Remove the power button with ngerprint reader.

14 Remove the DC-in port.

15 Remove the touchpad.

16 Remove the system board.

NOTE: The system board can be removed along with the heat sink.

About this task

The gure indicates the location of the palm-rest and keyboard assembly and provides a visual representation of the removal procedure.

Disassembly and reassembly 91

Step

After performing the steps in the pre-requisites, we are left with the palm-rest and keyboard assembly.

Installing the palm-rest and keyboard assembly

Prerequisite

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The gure indicates the location of the palm-rest and keyboard assembly and provides a visual representation of the installation procedure.

92 Disassembly and reassembly

Step

Place the palm-rest and keyboard assembly on a at surface.

Next step

1 Install the system board.

2 Install the touchpad.

3 Install the DC-in port.

4 Install the power button with ngerprint reader.

5 Install the display assembly.

6 Install the speakers.

7 Install the LED board.

8 Install the memory module.

9 Install the inner frame.

10 Install the WWAN card.

11 Install the WLAN card.

12 Install the HDD.

13 Install the solid state drive.

14 Install the battery.

15 Install the base cover.

16 Follow the procedure in After working inside your computer.

Disassembly and reassembly 93

Troubleshooting

Enhanced Pre-Boot System Assessment (ePSA)

diagnostics

The ePSA diagnostics (also known as system diagnostics) performs a complete check of your hardware. The ePSA is embedded with the

BIOS and is launched by the BIOS internally. The embedded system diagnostics provides a set of options for particular devices or device

groups allowing you to:

• Run tests automatically or in an interactive mode

• Repeat tests

• Display or save test results

• Run thorough tests to introduce additional test options to provide extra information about the failed device(s)

• View status messages that inform you if tests are completed successfully

• View error messages that inform you of problems encountered during testing

NOTE: Some tests for specic devices require user interaction. Always ensure that you are present at the computer terminal

when the diagnostic tests are performed.

Running the ePSA diagnostics

1 Turn on your computer.

2 As the computer boots, press the F12 key as the Dell logo appears.

3 On the boot menu screen, select the Diagnostics option.

4 Click the arrow at the bottom left corner.

Diagnostics front page is displayed.

5 Click the arrow in the lower-right corner to go to the page listing.

The items detected are listed.

6 To run a diagnostic test on a specic device, press Esc and click Yes to stop the diagnostic test.

7 Select the device from the left pane and click Run Tests.

8 If there are any issues, error codes are displayed.

Note the error code and validation number and contact Dell.

System diagnostic lights

Battery-status light

Indicates the power and battery-charge status.

Solid white — Power adapter is connected and the battery has more than 5 percent charge.

Amber — Computer is running on battery and the battery has less than 5 percent charge.

O

• Power adapter is connected and the battery is fully charged.

94 Troubleshooting

• Computer is running on battery and the battery has more than 5 percent charge.

• Computer is in sleep state, hibernation, or turned o.

The power and battery-status light blinks amber along with beep codes indicating failures.

For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times followed by

a pause. This 2,3 pattern continues until the computer is turned o indicating no memory or RAM is detected.

The following table shows dierent power and battery-status light patterns and associated problems.

Table 4. LED codes

Diagnostic light codes Problem description

2,1 Processor failure

2,2 System board: BIOS or ROM (Read-Only Memory) failure

2,3 No memory or RAM (Random-Access Memory) detected

2,4 Memory or RAM (Random-Access Memory) failure

2,5 Invalid memory installed

2,6 System-board or chipset error

2,7 Display failure

3,1 Coin-cell battery failure

3,2 PCI, video card/chip failure

3,3 Recovery image not found

3,4 Recovery image found but invalid

3,5 Power-rail failure

3,6 System BIOS Flash incomplete

3,7 Management Engine (ME) error

Camera status light: Indicates whether the camera is in use.

• Solid white — Camera is in use.

•O — Camera is not in use.

Caps Lock status light: Indicates whether Caps Lock is enabled or disabled.

• Solid white — Caps Lock enabled.

•O — Caps Lock disabled.

WiFi power cycle

About this task

If your computer is unable to access the internet due to WiFi connectivity issues a WiFi power cycle procedure may be performed. The

following procedure provides the instructions on how to conduct a WiFi power cycle:

NOTE: Some ISPs (Internet Service Providers) provide a modem/router combo device.

Steps

1 Turn o your computer.

2 Turn o the modem.

3 Turn o the wireless router.

4 Wait for 30 seconds.

5 Turn on the wireless router.

Troubleshooting 95

6 Turn on the modem.

7 Turn on your computer.

96 Troubleshooting

Getting help

Contacting Dell

Prerequisite

NOTE: If you do not have an active Internet connection, you can nd contact information on your purchase invoice, packing slip,

bill, or Dell product catalog.

About this task

Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some services

may not be available in your area. To contact Dell for sales, technical support, or customer service issues:

Steps

1 Go to Dell.com/support.

2 Select your support category.

3 Verify your country or region in the Choose a Country/Region drop-down list at the bottom of the page.

4 Select the appropriate service or support link based on your need.

Getting help 97

Table of Contents

DELL 3541 User Manual

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