Dell™ XPS™ L401X Service Manual Before You Begin Battery Memory Module(s) Wireless Mini-Card(s) Hard Drive Optical Drive Palm-Rest Assembly Keyboard Power-Button Board Coin-Cell Battery Display Camera Module Top Cover Speakers Processor Fan and Heat-Sink Assembly Processor Module Daughter Board Internal Card With Bluetooth® Wireless Technology AC-Adapter Connector System Board Flashing the BIOS Notes, Cautions, and Warnings NOTE: A NOTE indicates important information that helps you make better use of you
Back to Contents Page Battery Dell™ XPS™ L401X Service Manual Removing the Battery Replacing the Battery 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
Back to Contents Page Before You Begin Dell™ XPS™ L401X Service Manual Recommended Tools Turning Off Your Computer Before Working Inside Your Computer This manual provides procedures for removing and installing the components in your computer. Unless otherwise noted, each procedure assumes that the following conditions exist: l You have performed the steps in Turning Off Your Computer and Before Working Inside Your Computer. l You have read the safety information that shipped with your computer.
CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from the network device. 3. Disconnect all telephone or network cables from the computer. 4. Press and eject any installed cards from the Media Card Reader. 5. Disconnect your computer and all attached devices from their electrical outlets. 6. Disconnect all attached devices from your computer.
Back to Contents Page Flashing the BIOS Dell™ XPS™ L401X Service Manual The BIOS may require flashing when an update is available or when replacing the system board. To flash the BIOS: 1. Turn on the computer. 2. Go to support.dell.com/support/downloads. 3. Locate the BIOS update file for your computer: NOTE: The Service Tag for your computer is located on a label at the bottom of your computer. If you have your computer's Service Tag: a. Click Enter a Service Tag. b.
Back to Contents Page Internal Card With Bluetooth® Wireless Technology Dell™ XPS™ L401X Service Manual Removing the Bluetooth Card Replacing the Bluetooth Card 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
1 Bluetooth card 3 Bluetooth-card cable 2 tab Replacing the Bluetooth Card 1. Follow the instructions in Before You Begin. 2. Slide the Bluetooth card into the slot on the top cover and secure it in place. 3. Connect the Bluetooth-card cable to the connector on the Bluetooth card. 4. Follow the instructions from step 9 to step 11 in Replacing the Top Cover. 5. Replace the display assembly (see Replacing the Display Assembly). 6. Replace the keyboard (see Replacing the Keyboard). 7.
Back to Contents Page Camera Module Dell™ XPS™ L401X Service Manual Removing the Camera Module Replacing the Camera Module 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
Replacing the Camera Module 1. Follow the instructions in Before You Begin. 2. Use the alignment posts on the display back cover to place the camera module in position. 3. Adhere the aluminum foil over the camera module. 4. Replace the display panel (see Replacing the Display Panel). 5. Replace the display bezel (see Replacing the Display Bezel). 6. Replace the display assembly (see Replacing the Display Assembly). 7. Replace the keyboard (see Replacing the Keyboard). 8.
Back to Contents Page Coin-Cell Battery Dell™ XPS™ L401X Service Manual Removing the Coin-Cell Battery Replacing the Coin-Cell Battery 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
3. With the adhesive side of the coin-cell battery facing down, press the coin-cell battery on the slot on the top cover. 4. Replace the palm-rest assembly (see Replacing the Palm-Rest Assembly). 5. Follow the instructions from step 5 to step 6 in Replacing the Optical Drive. 6. Replace the hard drive (see Replacing the Hard Drive). 7. Replace the memory module(s) (see Replacing the Memory Module(s)). 8. Replace the battery (see Replacing the Battery).
Back to Contents Page Daughter Board Dell™ XPS™ L401X Service Manual Removing the Daughter Board Replacing the Daughter Board 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
1 daughter-board cable 3 screw 2 daughter board Replacing the Daughter Board 1. Follow the instructions in Before You Begin. 2. Align the connectors on the daughter board with the slots on the top cover and place it on the top cover. 3. Replace the screw that secures the daughter board to the top cover. 4. Slide the daughter-board cable into the connector on the daughter board and press the connector latch down to secure the cable. 5.
Back to Contents Page AC-Adapter Connector Dell™ XPS™ L401X Service Manual Removing the AC-Adapter Connector Replacing the AC-Adapter Connector 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
1 screw 3 AC-adapter connector cable 2 AC adapter connector Replacing the AC-Adapter Connector 1. Follow the instructions in Before You Begin. 2. Align the screw hole on the AC-adapter connector with the screw hole on the top cover. 3. Replace the screw that secures the AC-adapter connector to the top cover. 4. Route the AC-adapter connector cable through the routing guide. 5. Connect the AC-adapter connector cable to the system-board connector. 6.
Back to Contents Page Display Dell™ XPS™ L401X Service Manual Display Assembly Display Bezel Display Panel Display Cable Display-Panel Brackets 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
CAUTION: Be extremely careful when opening the display to prevent damaging the display assembly. 10. Turn the computer over and open the display as far as possible. 11. Disconnect the speaker cable from the system-board connector. 12. Disconnect the display cable from the system-board connector. 13. Note the routing of the display cable and remove the cable from the routing guide. 14. Note the routing of the Mini-Card antenna cables and slide them up through the slot on the computer base. 15.
10. Follow the instructions from step 5 to step 6 in Replacing the Optical Drive. 11. Replace the hard drive (see Replacing the Hard Drive). 12. Replace the Mini-Card(s) (see Replacing the Mini-Card(s)). 13. Replace the memory module(s) (see Replacing the Memory Module(s)). 14. Replace the battery (see Replacing the Battery). CAUTION: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer. Failure to do so may result in damage to the computer.
Removing the Display Panel 1. Follow the instructions in Before You Begin. 2. Remove the display assembly (see Removing the Display Assembly). 3. Remove the display bezel (see Removing the Display Bezel). 4. Disconnect the camera cable from the connector on the camera module. 5. Remove the eight screws that secure the display panel to the display back cover. 6. Note the routing of the Mini-Card antenna cables and remove them from the routing guides on the hinge. 7.
Removing the Display Cable 1. Follow the instructions in Before You Begin. 2. Remove the display assembly (see Removing the Display Assembly). 3. Remove the display bezel (see Removing the Display Bezel). 4. Remove the display panel (see Removing the Display Panel). 5. Turn the display panel over and place it on a clean surface. 6. Pull the pull-tab to disconnect the display cable from the connector on the display panel. 1 display cable 3 display-cable connector 7.
1. Follow the instructions in Before You Begin. 2. Remove the display assembly (see Removing the Display Assembly). 3. Remove the display bezel (see Removing the Display Bezel). 4. Remove the display panel (see Removing the Display Panel). 5. Remove the four screws (two on each side) that secure the display-panel brackets to the display panel. 6. Remove the display-panel brackets off the display panel. 1 display panel brackets (2) 2 screws (4) Replacing the Display-Panel Brackets 1.
Back to Contents Page Hard Drive Dell™ XPS™ L401X Service Manual Removing the Hard Drive Replacing the Hard Drive 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 at www.dell.com/regulatory_compliance. WARNING: If you remove the hard drive from the computer when the drive is hot, do not touch the metal housing of the hard drive.
1. Follow the instructions in Before You Begin. 2. Remove the new hard drive from its packaging. Save the original packaging for storing or shipping the hard drive. 3. Slide the hard drive into the hard-drive bay until it is fully seated. 4. Replace the two screws that secure the hard drive to the base cover. 5. Replace the memory module(s) (see Replacing the Memory Module(s)). 6. Replace the battery (see Replacing the Battery).
Back to Contents Page Processor Fan and Heat-Sink Assembly Dell™ XPS™ L401X Service Manual Removing the Processor Fan and Heat-Sink Assembly Replacing the Processor Fan and Heat-Sink Assembly 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 at www.dell.com/regulatory_compliance.
13. Remove the screw that secures the processor fan and heat-sink assembly to the top cover. 14. In sequential order (indicated on the processor heat-sink), loosen the five captive screws that secure the processor fan and heat-sink assembly to the system board. 15. Make note of the processor-fan cable routing and carefully lift the processor fan and heat-sink assembly away from the top-cover assembly.
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Back to Contents Page Keyboard Dell™ XPS™ L401X Service Manual Removing the Keyboard Replacing the Keyboard 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
1 screws (2) 2 keyboard 3 top cover 4 keyboard cable 5 connector tabs (2) 6 system-board connector 9. Without pulling hard on the keyboard, carefully lift the keyboard and slide the keyboard tabs out of the slots on the top cover. 10. Note the routing of the keyboard cable and remove the cable from the routing guide on the top cover. 11. Push the connector tabs up and pull the pull-tab to disconnect the keyboard backlight cable from the system-board connector.
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Back to Contents Page Memory Module(s) Dell™ XPS™ L401X Service Manual Removing the Memory Module(s) Replacing the Memory Module(s) 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
1 memory-module connector 3 memory module 6. 2 securing clips (2) Remove the memory module from the memory-module connector. Replacing the Memory Module(s) CAUTION: If you need to install memory modules in two connectors, install a memory module in the connector labeled "DIMM A" before you install a memory module in the connector labeled "DIMM B". 1. Follow the instructions in Before You Begin. 2. Align the notch in the memory module with the tab in the memory- module connector. 3.
As the computer boots, it detects the additional memory and automatically updates the system configuration information. To confirm the amount of memory installed in the computer: Click Start ® Control Panel® System and Security® System. CAUTION: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer. Failure to do so may result in damage to the computer.
Back to Contents Page Wireless Mini-Card(s) Dell™ XPS™ L401X Service Manual Removing the Mini-Card(s) Replacing the Mini-Card(s) 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
1 antenna cables (2) 2 Mini-Card 3 screw 7. 4 system-board connector Lift the Mini-Card(s) out of the system-board connector. CAUTION: When the Mini-Card is not in the computer, store it in protective antistatic packaging. For more information, see "Protecting Against Electrostatic Discharge" in the safety information that shipped with your computer. Replacing the Mini-Card(s) 1. Follow the instructions in Before You Begin. 2. Remove the new Mini-Card from its packaging.
Connectors on the Mini-Card Antenna Cable Color Scheme WLAN (2 antenna cables) Main WLAN (white triangle) white with gray stripe Auxiliary WLAN (black triangle) black with gray stripe WWAN (2 antenna cables) Main WWAN (white triangle) white Auxiliary WWAN (black triangle) black TV tuner (1 antenna cable) black 6. Align the tabs on the Mini-Card cover with the slots on the base cover and snap the Mini-Card cover into place. 7.
Back to Contents Page Optical Drive Dell™ XPS™ L401X Service Manual Removing the Optical Drive Replacing the Optical Drive 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
1 optical-drive bezel 2 optical drive 3 optical-drive bracket 4 screws (2) Replacing the Optical Drive 1. Follow the instructions in Before You Begin. 2. Align the screw holes on the optical-drive bracket with the screw holes on the optical drive. 3. Replace the two screws that secure the optical-drive bracket to the optical drive. 4. Snap the optical-drive bezel onto the optical drive. 5. Slide the optical drive into the optical-drive bay until it is fully seated. 6.
Back to Contents Page Palm-Rest Assembly Dell™ XPS™ L401X Service Manual Removing the Palm-Rest Assembly Replacing the Palm-Rest Assembly 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
1 tab 9. 2 palm-rest assembly Using your fingertips, gently ease the palm-rest assembly from the computer base. 10. Without pulling hard on the palm-rest assembly, place it away from the display as shown in the illustration below. 11. Lift the connector latch and pull the pull-tab to disconnect the touch-pad cable from the system-board connector. 12. Disconnect the control-strip cable from the system-board connector.
Replacing the Palm-Rest Assembly 1. Follow the instructions in Before You Begin. 2. Connect the control-strip cable to the system-board connector. 3. Slide the touch-pad cable into the system-board connector and press down on the connector latch to secure the cable. 4. Align the three tabs on the palm-rest assembly with the slots on the top cover and gently snap the palm-rest assembly into place. 5. Close the display and turn the computer over. 6.
Back to Contents Page Processor Module Dell™ XPS™ L401X Service Manual Removing the Processor Module Replacing the Processor Module 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
1 ZIF socket 2 processor module 3 pin-1 corner 4 ZIF-socket cam screw CAUTION: To ensure maximum cooling for the processor module, do not touch the heat transfer areas on the processor thermal-cooling assembly. The oils in your skin can reduce the heat transfer capability of the thermal pads. CAUTION: When removing the processor module, pull the module straight up. Be careful not to bend the pins on the processor module. 14. Lift the processor module off the ZIF socket.
13. Replace the memory module(s) (see Replacing the Memory Module(s)). 14. Replace the battery (see Replacing the Battery). CAUTION: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer. Failure to do so may result in damage to the computer.
Back to Contents Page Power-Button Board Dell™ XPS™ L401X Service Manual Removing the Power-Button Board Replacing the Power-Button Board 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
1 screw 2 power-button board 3 system-board connector 4 display cable 5 top cover Replacing the Power-Button Board 1. Follow the instructions in Before You Begin. 2. Use the alignment post to place the power-button board on the top cover. 3. Replace the screw that secures the power-button board to the top cover. 4. Connect the power button-board cable to the system-board connector. 5. Connect the display cable to the system-board connector. 6.
Back to Contents Page Speakers Dell™ XPS™ L401X Service Manual Removing the Speakers Replacing the Speaker 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
1 speaker cable 3 screws (4) 2 speakers (2) Replacing the Speaker 1. Follow the instructions in Before You Begin. 2. Route the speakers cable through the routing guides 3. Align the screw holes on the speakers with the screw holes on the base cover. 4. Replace the four screws (two on each speaker) that secure the speakers to the base cover. 5. Follow the instructions from step 9 to step 11 in Replacing the Top Cover. 6. Replace the display assembly (see Replacing the Display Assembly). 7.
Back to Contents Page System Board Dell™ XPS™ L401X Service Manual Removing the System Board Replacing the System Board Entering the Service Tag in the BIOS 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
1 power-button board cable connector 2 touch-pad status light cable connector 3 coin-cell battery cable 15. Remove the AC-adapter connector (see Removing the AC-Adapter Connector). 16. Disconnect the Bluetooth-card cable, logo-light cable, and daughter-board cable from their connectors on the system board. 17. Remove the two screws that secure the system board to the top cover.
2. Align the connectors on the system board with the slots on the top cover and place it on the top cover. 3. Replace the two screws that secure the system board to the top cover. 4. Connect the Bluetooth-card cable, logo-light cable, and daughter-board cable to their connectors on the system board. 5. Replace the AC-adapter connector (see Replacing the AC-Adapter Connector). 6. Replace the processor module (see Replacing the Processor Module). 7.
Back to Contents Page Dell™ XPS™ L401X Service Manual NOTE: A NOTE indicates important information that helps you make better use of your computer. CAUTION: A CAUTION indicates potential damage to hardware or loss of data if instructions are not followed. WARNING: A WARNING indicates a potential for property damage, personal injury, or death. Information in this document is subject to change without notice. © 2010 Dell Inc. All rights reserved.
Back to Contents Page Top Cover Dell™ XPS™ L401X Service Manual Removing the Top Cover Replacing the Top Cover 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 at www.dell.com/regulatory_compliance. CAUTION: Only a certified service technician should perform repairs on your computer.
15. Make note of the speakers cable routing. 16. Remove the nine screws that secure the top-cover assembly to the base cover. 17. Using your fingertips, gently ease the top-cover assembly from the base cover. 18. Lift the top cover assembly off the base cover. 1 top-cover assembly 19. Remove the Bluetooth-card (see Removing the Bluetooth Card). 20. Remove the daughter board (see Removing the Daughter Board). 21. Remove the AC-adapter connector (see Removing the AC-Adapter Connector). 22.
12. Replace the display assembly (see Replacing the Display Assembly). 13. Replace the keyboard (see Replacing the Keyboard). 14. Replace the palm-rest assembly (see Replacing the Palm-Rest Assembly). 15. Follow the instructions from step 5 to step 6 in Replacing the Optical Drive. 16. Replace the hard drive (see Replacing the Hard Drive). 17. Replace the Mini-Card(s) (see Replacing the Mini-Card(s)). 18. Replace the memory module(s) (see Replacing the Memory Module(s)). 19.
