Dell XPS L502X User manual

Dell™XPS™L502XServiceManual
Notes, Cautions, and Warnings
Information in this document is subject to change without notice.
©2011DellInc.Allrightsreserved.
Trademarksusedinthistext:Dell™,theDELLlogo,andXPS™aretrademarksofDellInc.; Microsoft®, Windows®, and the Windows start button logo are either trademarks or
registered trademarks of Microsoft Corporation in the United States and/or other countries; Bluetooth®is a registered trademark owned by Bluetooth SIG, Inc. and is used by Dell
Inc. under license.
Reproduction of these materials in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.
Regulatorymodel:P11FseriesRegulatorytype:P11F003
2011 -02 Rev. A00
Before You Begin
Battery
Module Cover
Memory Module(s)
Wireless Mini-Card(s)
Optical Drive
Palm-Rest Assembly
Power-Button Board
Coin-Cell Battery
Hard Drive
Keyboard
Display

Camera Module
Top Cover
Fan
Subwoofer
AC-Adapter Connector
USB Board
TV Tuner Connector
Heat Sink
Processor Module
System Board
Speakers
Flashing the BIOS
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.

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Battery
Dell™XPS™L502XServiceManual
Removing the Battery
Replacing the Battery
Removing the Battery

1. Follow the instructions in Before You Begin.

2. Turn the computer over.

3. Slide the battery release latch to the side.

4. Lift the battery up at an angle and remove it from the battery bay.
Replacing the Battery

1. Follow the instructions in Before You Begin.

2. Align the tabs on the battery with the slots in the battery bay and press the battery down until it clicks into place.
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
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.DamageduetoservicingthatisnotauthorizedbyDell™
is not covered by your warranty.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal
surface (such as a connector on your computer).
CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries designed for
other Dell computers.
1
battery
2
battery release latch
CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer.

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Before You Begin
Dell™XPS™L502X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.
lA component can be replaced or—if purchased separately—installed by performing the removal procedure in reverse order.
Recommended Tools
The procedures in this document may require the following tools:
lSmall flat-blade screwdriver
lPhillips screwdriver
lPlastic scribe
lBIOS executable update program available at support.dell.com
Turning Off Your Computer

1. Save and close all open files and exit all open programs.

2. To shut down the operating system, click Start and then click Shut Down.

3. Ensure that the computer is turned off. If your computer did not automatically turn off when you shut down the operating system, press and hold the
power button until the computer turns off.
Before Working Inside Your Computer
Use the following safety guidelines to help protect your computer from potential damage and to help to ensure your own personal safety.

1. Ensure that the work surface is flat and clean to prevent the computer cover from being scratched.

2. Turn off your computer (see Turning Off Your Computer) and all attached devices.

3. Disconnect all telephone or network cables from the computer.
CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your computer.
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: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal
surface (such as a connector on your 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: Onlyacertifiedservicetechnicianshouldperformrepairsonyourcomputer.DamageduetoservicingthatisnotauthorizedbyDell™
is not covered by your warranty.
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.
CAUTION: To avoid damaging the computer, perform the following steps before you begin working inside the computer.
CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from the network device.


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.

7. Remove the battery (see Removing the Battery).

8. Turn the computer top-side up, open the display, and press the power button to ground the system board.
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
CAUTION: To help prevent damage to the system board, remove the main battery (see Removing the Battery) before working inside the
computer.
CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back
of the computer. While you work, periodically touch an unpainted metal surface to dissipate static electricity, which could harm internal
components.

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Flashing the BIOS
Dell™XPS™L502X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:
If you have your computer's Service Tag:
a. Click Enter a Tag.
b. Enter your computer's Service Tag in the Enter a service tag: field, click Go, and proceed to step 4.
If you do not have your computer's Service Tag:
a. Click Select Model.
b. Select the type of product in the Select Your Product Family list.
c. Select the product brand in the Select Your Product Line list.
d. Select the product model number in the Select Your Product Model list.
e. Click Confirm.

4. A list of results appear on the screen. Click BIOS.

5. Click Download Now to download the latest BIOS file.
The File Download window appears.

6. Click Save to save the file on your desktop. The file downloads to your desktop.

7. Click Close if the Download Complete window appears.
The file icon appears on your desktop and is titled the same as the downloaded BIOS update file.

8. Double-click the file icon on the desktop and follow the instructions on the screen.
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
NOTE: The Service Tag for your computer is located on a label at the bottom of your computer.
NOTE: If you have selected a different model and want to start over again, click Start Over on the top right of the menu.

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Camera Module
Dell™XPS™L502XServiceManual
Removing the Camera Module
Replacing the Camera Module
Removing the Camera Module

1. Follow the instructions in Before You Begin.

2. Remove the battery (see Removing the Battery).

3. Remove the module cover (see Removing the Module Cover).

4. Remove the memory module(s) (see Removing the Memory Module(s)).

5. Remove the palm-rest assembly (see Removing the Palm-Rest Assembly).

6. Remove the keyboard (see Removing the Keyboard).

7. Remove the display assembly (see Removing the Display Assembly).

8. Remove the display bezel (see Removing the Display Bezel).

9. Disconnect the camera cable from the connector on the camera module.

10. Gently pry the camera module off the aluminium foil.
Replacing the Camera Module

1. Follow the instructions in Before You Begin.

2. Adhere the camera module to the aluminium foil.

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.DamageduetoservicingthatisnotauthorizedbyDell™
is not covered by your warranty.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal
surface (such as a connector on your computer).
CAUTION: To help prevent damage to the system board, remove the main battery (see Removing the Battery) before working inside the
computer.
1
camera module
2
camera cable connector


3. Use the alignment posts on the display back cover to place the camera module in position.

4. Connect the camera cable to the connector on the camera module.

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. Replace the palm-rest assembly (see Replacing the Palm-Rest Assembly).

9. Replace the memory module(s) (see Replacing the Memory Module(s)).

10. Replace the module cover (see Replacing the Module Cover).

11. Replace the battery (see Replacing the Battery).
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
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.

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Coin-Cell Battery
Dell™XPS™L502XServiceManual
Removing the Coin-Cell Battery
Replacing the Coin-Cell Battery
Removing the Coin-Cell Battery

1. Follow the instructions in Before You Begin.

2. Remove the battery (see Removing the Battery).

3. Remove the palm-rest assembly (see Removing the Palm-Rest Assembly).

4. Using a plastic scribe, gently pry the coin-cell battery out of the battery socket on the system board.
Replacing the Coin-Cell Battery

1. Follow the instructions in Before You Begin.

2. With the positive side facing up, snap the coin-cell battery into the battery socket on the system board.

3. Replace the palm-rest assembly (see Replacing the Palm-Rest Assembly).

4. Replace the battery (see Replacing the Battery).
Back to Contents Page

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.DamageduetoservicingthatisnotauthorizedbyDell™
is not covered by your warranty.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal
surface (such as a connector on your computer).
CAUTION: To help prevent damage to the system board, remove the main battery (see Removing the Battery) before working inside the
computer.
1
coin-cell battery
2
plastic scribe
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.

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USB Board
Dell™XPS™L502XServiceManual
Removing the USB Board
Replacing the USB Board
Removing the USB Board

1. Follow the instructions in Before You Begin.

2. Remove the battery (see Removing the Battery).

3. Remove the module cover (see Removing the Module Cover).

4. Remove the memory module(s) (see Removing the Memory Module(s)).

5. Remove the palm-rest assembly (see Removing the Palm-Rest Assembly).

6. Remove the keyboard (see Removing the Keyboard).

7. Remove the display assembly (see Removing the Display Assembly).

8. Follow the instructions from step 9 to step 14 in Removing the Top Cover.

9. Remove the AC adapter connector (see Removing the AC-Adapter Connector).

10. Lift the connector latch and disconnect the USB-board cable from the connector on the USB board.

11. Remove the three screws that secure the USB board to the top cover.

12. Carefully ease the connectors on the USB board out of the slots on the top cover and lift the USB board off the top cover.
Replacing the USB 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.DamageduetoservicingthatisnotauthorizedbyDell™
is not covered by your warranty.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal
surface (such as a connector on your computer).
CAUTION: To help prevent damage to the system board, remove the main battery (see Removing the Battery) before working inside the
computer.
1
screws (3)
2
USB board
3
USB-board cable connector
4
USB-board cable


1. Follow the instructions in Before You Begin.

2. Align the connectors on the USB board with the slots on the top cover and place it on the top cover.

3. Replace the three screws that secure the USB board to the top cover.

4. Slide the USB-board cable into the connector on the USB board and press the connector latch down to secure the cable.

5. Replace the AC adapter connector (see Replacing the AC-Adapter Connector).

6. Follow the instructions from step 8 to step 11 in Replacing the Top Cover.

7. Replace the display assembly (see Replacing the Display Assembly).

8. Replace the keyboard (see Replacing the Keyboard).

9. Replace the palm-rest assembly (see Replacing the Palm-Rest Assembly).

10. Replace the memory module(s) (see Replacing the Memory Module(s)).

11. Replace the module cover (see Replacing the Module Cover).

12. Replace the battery (see Replacing the Battery).
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
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
AC-Adapter Connector
Dell™XPS™L502XServiceManual
Removing the AC-Adapter Connector
Replacing the AC-Adapter Connector
Removing the AC-Adapter Connector

1. Follow the instructions in Before You Begin.

2. Remove the battery (see Removing the Battery).

3. Remove the module cover (see Removing the Module Cover).

4. Remove the memory module(s) (see Removing the Memory Module(s)).

5. Remove the palm-rest assembly (see Removing the Palm-Rest Assembly).

6. Remove the keyboard (see Removing the Keyboard).

7. Remove the display assembly (see Removing the Display Assembly).

8. Follow the instructions from step 9 to step 14 in Removing the Top Cover.

9. Turn the top-cover assembly over.

10. Disconnect the AC-adapter connector cable from the connector on the system-board.

11. Make note of the AC-adapter connector cable routing and remove the cable from the routing guides.

12. Remove the screw that secures the AC-adapter connector to the top cover.

13. Lift the AC-adapter connector off the base 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.DamageduetoservicingthatisnotauthorizedbyDell™
is not covered by your warranty.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal
surface (such as a connector on your computer).
CAUTION: To help prevent damage to the system board, remove the main battery (see Removing the Battery) before working inside the
computer.
1
screw
2
AC adapter connector
3
AC-adapter connector cable

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 guides.

5. Connect the AC-adapter connector cable to the system-board connector.

6. Follow the instructions from step 8 to step 11 in Replacing the Top Cover.

7. Replace the display assembly (see Replacing the Display Assembly).

8. Replace the keyboard (see Replacing the Keyboard).

9. Replace the palm-rest assembly (see Replacing the Palm-Rest Assembly).

10. Replace the memory module(s) (see Replacing the Memory Module(s)).

11. Replace the module cover (see Replacing the Module Cover).

12. Replace the battery (see Replacing the Battery).
Back to Contents Page

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
Display
Dell™XPS™L502XServiceManual
Display Assembly
Display Bezel
Display Panel
Display Cable
Display-Panel Brackets
Display Assembly

Removing the Display Assembly

1. Follow the instructions in Before You Begin.

2. Remove the battery (see Removing the Battery).

3. Remove the module cover (see Removing the Module Cover).

4. Remove the memory module(s) (see Removing the Memory Module(s)).

5. Disconnect the antenna cables from the Mini-Cards.

6. Note the routing of the Mini-Card antenna cables and remove them from the routing guides on base cover.

7. Remove the two screws that secure the display assembly to the base cover.

8. Remove the palm-rest assembly (see Removing 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.DamageduetoservicingthatisnotauthorizedbyDell™
is not covered by your warranty.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal
surface (such as a connector on your computer).
CAUTION: To help prevent damage to the system board, remove the main battery (see Removing the Battery) before working inside the
computer.
1
antenna cables
2
base cover
CAUTION: Be extremely careful when opening the display to prevent damaging the display assembly.


9. Turn the computer over and open the display as far as possible.

10. Remove the keyboard (see Removing the Keyboard).

11. Pull the pull-tab to disconnect the display cable from the system-board connector.

12. Disconnect the digitizer board cable from the system-board connector.

13. Loosen the captive screw that secures the display grounding cable.

14. Note the routing of the display cable and remove the cable from the routing guides.

15. Note the routing of the Mini-Card antenna cables and remove them from the routing guides on the top cover.

16. Gently pull the antenna cables up from the bottom of the computer through the slot on the top cover.

17. Remove the four screws that secure the display assembly to the computer base.

18. Lift the display assembly off the computer base.

NOTE: The digitizer board is optional and may not be present in your computer.
1
captive screw
2
display cable connector
3
digitizer board cable
1
display assembly
2
screws (4)
3
display cable
4
top cover
5
antenna cables

Replacing the Display Assembly

1. Follow the instructions in Before You Begin.

2. Place the display assembly in position and replace the four screws that secure the display assembly to the computer base.

3. Route the display cable through the routing guides and connect the display cable to the system-board connector.

4. Connect the digitizer board cable to the system-board connector.

5. Tighen the captive screw that secures the display grounding cable.

6. Route the antenna cables through the routing guides on the top cover.

7. Slide the antenna cables to the bottom of the computer through the slot on the top cover.

8. Replace the keyboard (see Replacing the Keyboard).

9. Replace the palm-rest assembly (see Replacing the Palm-Rest Assembly).

10. Close the display and turn the computer over.

11. Route the antenna cables through the routing guides on the base cover.

12. Connect the antenna cables to the connectors on the Mini-Card.

13. Replace the memory module(s) (see Replacing the Memory Module(s)).

14. Replace the module cover (see Replacing the Module Cover).

15. Replace the battery (see Replacing the Battery).
Display Bezel

Removing the Display Bezel

1. Follow the instructions in Before You Begin.

2. Remove the display assembly (see Removing the Display Assembly).

3. Push the display bezel outwards to release it from the tabs that secure the display bezel to the back cover.

4. Using your fingertips, gently pry the outside edge of the display bezel off the back cover.

5. Lift the display bezel off the display assembly.
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.
CAUTION: The display bezel is extremely fragile. Be careful when removing it to prevent damaging the bezel.


Replacing the Display Bezel

1. Follow the instructions in Before You Begin.

2. Align the display bezel with the display back cover, and gently snap it into place.

3. Replace the display assembly (see Replacing the Display Assembly).
Display Panel

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. Pull the pull-tab to disconnect the digitizer board cable from the connector on the digitizer board.
1
display bezel
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.


6. Remove the ten screws that secure the display panel to the display back cover.

7. Remove the two screws that secure the digitizer board to the display back cover.

8. Note the routing of the antenna cables and remove them from the routing guide on the right display hinge.

9. Note the routing of the display cable and remove it from the routing guide on the left display hinge.

10. Lift the display panel off the display back cover.

Replacing the Display Panel

1. Follow the instructions in Before You Begin.

2. Place the display panel over the display back cover.

3. Route the display cable through the routing guide on the left display hinge.

4. Route the antenna cables through the routing guide on the right display hinge.

5. Replace the ten screws that secure the display panel to the display back cover.

6. Replace the two screws that secure the digitizer board to the display back cover.

7. Connect the camera cable to the connector on the camera module.

8. Connect the digitizer board cable to the connector on the digitizer board.

9. Replace the display bezel (see Replacing the Display Bezel).

10. Replace the display assembly (see Replacing the Display Assembly).
1
camera cable
2
display panel
3
digitizer board cable
1
display panel
2
screws (12)
3
display cable
4
digitizer board
5
antenna cables
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.

Display Cable

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.

7. Gently peel off the display cable from the display panel.

Replacing the Display Cable

1. Follow the instructions in Before You Begin.

2. Adhere the display cable to the display panel.

3. Connect the display cable to the connector on the display panel.

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 (Replacing the Display Assembly).
Display-Panel Brackets

Removing the Display-Panel Brackets

1
pull tab
2
display-cable connector
3
display cable
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.


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.

Replacing the Display-Panel Brackets

1. Follow the instructions in Before You Begin.

2. Place the display-panel brackets in position.

3. Replace the four screws (two on each side) that secure the display-panel brackets to the display panel.

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 (Replacing the Display Assembly).
Back to Contents Page

1
screws (4)
2
display panel brackets (2)
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
Fan
Dell™XPS™L502XServiceManual
Removing the Fan
Replacing the Fan
Removing the Fan

1. Follow the instructions in Before You Begin.

2. Press and eject any installed cards from the Media Card Reader.

3. Remove the battery (see Removing the Battery).

4. Remove the module cover (see Removing the Module Cover).

5. Remove the memory module(s) (see Removing the Memory Module(s)).

6. Remove the palm-rest assembly (see Removing the Palm-Rest Assembly).

7. Remove the keyboard (see Removing the Keyboard).

8. Remove the display assembly (see Removing the Display Assembly).

9. Follow the instructions from step 9 to step 14 in Removing the Top Cover.

10. Remove the two screws that secure the fan to the base cover.

11. Lift the fan off the base cover.
Replacing the Fan

1. Follow the instructions in Before You Begin.

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.DamageduetoservicingthatisnotauthorizedbyDell™
is not covered by your warranty.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal
surface (such as a connector on your computer).
CAUTION: To help prevent damage to the system board, remove the main battery (see Removing the Battery) before working inside the
computer.
1
screws (2)
2
fan