Dell Latitude E6400 XFR User manual

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Dell™ Latitude™ E6420 XFR
Service Manual

Dell™ Latitude™ E6420 XFR Service Manual
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Notes, Notices, and Cautions
NOTE:
A NOTE indicates important information that helps you make better use of your computer.
NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the
problem.
CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.
Information in this document is subject to change without notice.
© 2012 Dell Inc. All rights reserved.
Reproduction of these materials in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.
Trademarks used in this text: Dell, Latitude, and the DELL logo are trademarks of Dell Inc.; Bluetooth is a registered trademark owned by
Bluetooth SIG, Inc. and is used by Dell under license; Intel is a registered trademark of Intel Corporation in the U.S. and other countries;
Microsoft, Windows, Windows Vista and the Windows Vista start button are either trademarks or registered trademarks of Microsoft
Corporation in the United States and/or other countries.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their
products. Dell Inc. disclaims any proprietary interest in trademarks and trade names other than its own.
January 2012. Rev. A01

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Table of Contents
1WORKING ON YOUR COMPUTER ...............................................................................................................................7
1.1 RECOMMENDED TOOLS .............................................................................................................................................................. 7
1.2 BEFORE WORKING ON YOUR COMPUTER ................................................................................................................................. 7
1.3 AFTER WORKING ON YOUR COMPUTER ................................................................................................................................... 8
2BOTTOM ACCESS PANEL ................................................................................................................................................9
2.1 REMOVING THE BOTTOM ACCESS PANEL ................................................................................................................................. 9
2.2 REPLACING THE BOTTOM ACCESS PANEL................................................................................................................................. 9
3WLAN/WIMAX CARD.....................................................................................................................................................10
3.1 REMOVING THE WLAN/WIMAX CARD................................................................................................................................... 10
3.2 REPLACING THE WLAN/WIMAX CARD .................................................................................................................................. 11
4WWAN/FMC CARD..........................................................................................................................................................12
4.1 REMOVING A WWAN/FMC CARD .......................................................................................................................................... 12
4.2 REPLACING A WWAN/FMC CARD ......................................................................................................................................... 13
5WPAN (UWB) CARD .......................................................................................................................................................13
5.1 REMOVING A WPAN (UWB) CARD ....................................................................................................................................... 13
5.2 REPLACING A WPAN (UWB) CARD....................................................................................................................................... 15
6RF PASSTHRU BOARD (OPTIONAL) .......................................................................................................................15
6.1REMOVING THE RF PASSTHRU BOARD ................................................................................................................................... 15
6.2 REPLACING THE RF PASSTHRU BOARD .................................................................................................................................. 17
7FAN ASSEMBLY.................................................................................................................................................................18
7.1 REMOVING THE FAN ASSEMBLY............................................................................................................................................... 18
7.2 REPLACING THE FAN ASSEMBLY.............................................................................................................................................. 19
8PROCESSOR HEATSINK ASSEMBLY........................................................................................................................20
8.1REMOVING THE PROCESSOR HEATSINK ASSEMBLY............................................................................................................... 20
8.2 REPLACING THE PROCESSOR HEATSINK ASSEMBLY .............................................................................................................. 21
9PROCESSOR MODULE....................................................................................................................................................22
9.1 REMOVING THE PROCESSOR MODULE .................................................................................................................................... 22
9.2 REPLACING THE PROCESSOR MODULE ................................................................................................................................... 22
10 MEMORY...........................................................................................................................................................................24
10.1 REMOVING A MEMORY MODULE........................................................................................................................................... 24
10.2 REPLACING A MEMORY MODULE.......................................................................................................................................... 25
11 COIN-CELL BATTERY..................................................................................................................................................25
11.1 REMOVING THE COIN-CELL BATTERY ................................................................................................................................. 25
11.2 REPLACING THE COIN-CELL BATTERY................................................................................................................................. 26
12 KEYBOARD COVER.......................................................................................................................................................27
12.1 REMOVING THE KEYBOARD COVER...................................................................................................................................... 27
12.2 REPLACING THE KEYBOARD COVER..................................................................................................................................... 27
13 KEYBOARD ......................................................................................................................................................................28

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13.1 REMOVING THE KEYBOARD .................................................................................................................................................. 28
13.2 REPLACING THE KEYBOARD.................................................................................................................................................. 30
14 GPS MODULE (OPTIONAL)......................................................................................................................................30
14.1 REMOVING THE GPS MODULE ............................................................................................................................................. 30
14.2 REPLACING THE GPS CARD ................................................................................................................................................. 31
15 DISPLAY BEZEL ............................................................................................................................................................32
15.1 REMOVING THE DISPLAY BEZEL .......................................................................................................................................... 32
15.2 REPLACING THE DISPLAY BEZEL.......................................................................................................................................... 34
16 LCD PANEL ......................................................................................................................................................................34
16.1 REMOVING THE LCD PANEL................................................................................................................................................. 34
16.2 REPLACING THE LCD PANEL ................................................................................................................................................ 35
17 MICROPHONE/CAMERA MODULE (OPTIONAL).............................................................................................36
17.1 REMOVING THE MICROPHONE/CAMERA MODULE .............................................................................................................. 36
17.2 REPLACING THE MICROPHONE/CAMERA MODULE.............................................................................................................. 36
18 TOUCH CONTROLLER MODULE (OPTIONAL) ..................................................................................................37
18.1 REMOVING THE TOUCH CONTROLLER MODULE .................................................................................................................. 37
18.2 REPLACING THE TOUCH CONTROLLER MODULE ................................................................................................................. 37
19 DISPLAY LED BOARD .................................................................................................................................................37
19.1 REMOVING THE DISPLAY LED BOARD ................................................................................................................................ 37
19.2 REPLACING THE DISPLAY LED BOARD ............................................................................................................................... 38
20 GPS ANTENNA (OPTIONAL) ...................................................................................................................................38
20.1 REMOVING THE GPS ANTENNA ........................................................................................................................................... 38
20.2 REPLACING THE GPS ANTENNA........................................................................................................................................... 39
21 DISPLAY CABLE CHANNEL COVERS ....................................................................................................................39
21.1 REMOVING THE DISPLAY CABLE CHANNEL COVERS .......................................................................................................... 39
21.2 REPLACING THE DISPLAY CABLE CHANNEL COVERS.......................................................................................................... 39
22 DISPLAY ASSEMBLY ...................................................................................................................................................40
22.1 REMOVING THE DISPLAY ASSEMBLY ................................................................................................................................... 40
22.2 REPLACING THE DISPLAY ASSEMBLY................................................................................................................................... 42
23 PALM REST......................................................................................................................................................................43
23.1 REMOVING THE PALM REST ................................................................................................................................................. 43
23.2 REPLACING THE PALM REST................................................................................................................................................. 46
24 SMARTCARD ASSEMBLY ...........................................................................................................................................46
24.1 REMOVING THE SMARTCARD ASSEMBLY ............................................................................................................................. 46
24.2 REPLACING THE SMARTCARD ASSEMBLY ............................................................................................................................ 48
25 EXPRESS CARD CAGE.................................................................................................................................................49
25.1 REMOVING THE EXPRESS CARD CAGE ................................................................................................................................ 49
25.2 REPLACING THE SMARTCARD ASSEMBLY ............................................................................................................................ 50
26 HARD DRIVE ..................................................................................................................................................................50
26.1 REMOVING THE HARD DRIVE............................................................................................................................................... 50

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26.2 REPLACING THE HARD DRIVE .............................................................................................................................................. 52
27 MODULAR DRIVE .........................................................................................................................................................52
27.1 REMOVING THE MODULAR DRIVE........................................................................................................................................ 52
27.2 REPLACING THE MODULAR DRIVE ....................................................................................................................................... 53
28 AUDIO BOARD...............................................................................................................................................................53
28.1 REMOVING THE AUDIO BOARD ASSEMBLY ......................................................................................................................... 53
28.2 REPLACING THE AUDIO BOARD ........................................................................................................................................... 54
29 MEDIA BOARD ...............................................................................................................................................................54
29.1 REMOVING THE MEDIA BOARD ASSEMBLY ......................................................................................................................... 54
29.2 REPLACING THE MEDIA BOARD ........................................................................................................................................... 55
30 USB BOARD.....................................................................................................................................................................56
30.1 REMOVING THE USB BOARD ASSEMBLY ............................................................................................................................ 56
30.2 REPLACING THE USB BOARD .............................................................................................................................................. 57
31 SYSTEM BOARD ASSEMBLY....................................................................................................................................57
31.1 REMOVING THE SYSTEM BOARD ASSEMBLY ....................................................................................................................... 58
31.2 REPLACING THE SYSTEM BOARD ASSEMBLY ...................................................................................................................... 63
32 I/O CARD.........................................................................................................................................................................63
32.1 REMOVING THE I/O CARD ................................................................................................................................................... 63
32.2 REPLACING THE I/O CARD .................................................................................................................................................. 64
33 SPEAKER ASSEMBLY ..................................................................................................................................................64
33.1 REMOVING THE SPEAKER ASSEMBLY................................................................................................................................... 64
33.2 REPLACING THE SPEAKER ASSEMBLY.................................................................................................................................. 64
34 DC POWER CABLE........................................................................................................................................................65
34.1 REMOVING THE DC POWER CABLE ..................................................................................................................................... 65
34.2 REPLACING THE DC POWER CABLE..................................................................................................................................... 65
35 BASE ASSEMBLY...........................................................................................................................................................66
35.1 REMOVING THE BASE ASSEMBLY......................................................................................................................................... 66
35.2 REPLACING THE BASE ASSEMBLY ........................................................................................................................................ 66
36 STYLUS .............................................................................................................................................................................66
36.1 REMOVING THE STYLUS........................................................................................................................................................ 66
36.2 REPLACING THE STYLUS....................................................................................................................................................... 67
37 SHOULDER STRAP ANCHORS.................................................................................................................................67
37.1 REMOVING THE SHOULDER STRAP ANCHORS .................................................................................................................... 67
37.2 REPLACING THE SHOULDER STRAP ANCHORS.................................................................................................................... 67
38 HANDLE ............................................................................................................................................................................67
38.1 REMOVING THE HANDLE....................................................................................................................................................... 67
38.2 REPLACING THE HANDLE ...................................................................................................................................................... 68
39 DOORS ..............................................................................................................................................................................68
39.1 REMOVING MEDIA BAY DOOR ............................................................................................................................................. 68
39.2 REPLACING MEDIA BAY DOOR............................................................................................................................................. 69

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39.3 REMOVING THE HDMI/ESATA DOOR................................................................................................................................ 69
39.4 REPLACING THE HDMI/ESATA DOOR ............................................................................................................................... 70
39.5 REMOVING THE BATTERY DOOR .......................................................................................................................................... 70
39.6 REPLACING THE BATTERY DOOR ......................................................................................................................................... 70
39.7 REMOVING THE POWER AND/OR LAN DOOR ..................................................................................................................... 71
39.8 REPLACING THE POWER AND/OR LAN DOOR..................................................................................................................... 71
39.9 REMOVING THE VGA/SERIAL DOOR................................................................................................................................... 72
39.10 REPLACING THE VGA/SERIAL DOOR .................................................................................................................................. 72
39.11 REMOVING THE VGA PANEL COVER ................................................................................................................................... 72
39.12 REPLACING THE VGA PANEL COVER................................................................................................................................... 73
39.13 REMOVING THE HDD DOOR ................................................................................................................................................ 73
39.14 REPLACING THE HDD DOOR ............................................................................................................................................... 73
40 SYSTEM SETUP..............................................................................................................................................................74
40.1 SETUP OVERVIEW ................................................................................................................................................................. 74
40.2 SYSTEM SETUP MENU........................................................................................................................................................... 74
41 DIAGNOSTICS ...............................................................................................................................................................80
41.1 BATTERY STATUS LIGHTS .................................................................................................................................................... 81
41.2 DEVICE STATUS LIGHTS....................................................................................................................................................... 81
42 CONTACTING DELL .....................................................................................................................................................81

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1Working on Your Computer
This document provides procedures for removing and installing the components in your computer.
Unless otherwise noted, each procedure assumes that the following:
•You have performed the steps in Before Working On Your Computer.
•You have read the safety information that shipped with your computer.
NOTE: The color of your system and certain system components may appear differently than
shown in this document.
1.1 Recommended Tools
The procedures in this document may require the following tools:
•Small flat-blade screwdriver
•Phillips screwdriver #0
•Phillips screwdriver #1
•Small plastic scribe
•5-mm hex nut driver (for VGA posts)
•Flash BIOS update program CD
1.2 Before Working On Your Computer
Use the following safety guidelines to help protect your computer from potential damage and to help ensure your own
personal safety.
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions that shipped with your computer.
NOTICE: 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.
NOTICE: 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 the back of the
computer.
NOTICE:
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.
NOTICE: When disconnecting a cable, pull on the cable’s connector or on its strain-relief loop,
not on the cable itself. For cable connectors with
locking tabs, press inward on the locking tabs to
release the connector. When connecting a cable, ensure that the connectors are correctly
oriented and aligned to avoid damage to the connector and/or the connector’s pins.
1. Ensure that the work surface is flat and clean to prevent the computer cover from being scratched.
2. Shut down your computer.
•In Windows Vista, click Start , click the arrow icon, and then click Shut Down to turn off your
computer.
•In Windows 7, click Start , and then click Shut Down to turn off your computer.
NOTE: Ensure that the computer is off and not in a power management mode. If you cannot shut
down the computer using the operating system, press and hold the power button for 4 seconds.
3. Disconnect your computer and all attached devices from their electrical outlets.

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NOTICE: To disconnect a network cable, first unplug the cable from your computer and then
unplug it from the network device.
4. Disconnect any telephone, network, and USB cables from the computer.
NOTICE: To help prevent damage to the system board, you must remove the battery from the
battery bay before you service the computer.
NOTE: See the battery removal instructions adhered to the edge of the battery.
5. Open the rear battery door by sliding the latch to the right and then downward.
6. Turn the computer upside down.
7. Slide the battery release latches toward each other to place them in the unlocked position.
8. Open door fully and pull the battery tab to slide the battery out of the battery bay.
9. Disconnect any external devices and remove any installed cards before working on your computer:
•To remove any installed cards, such as an ExpressCard Card, see the Dell™ Technology Guide on your
computer or at support.dell.com.
•To undock from a docking station, see the E-Port User’s Guide or the E-Port Plus User’s Guide on
support.dell.com.
•To remove the docking adapter, see the documentation that shipped with your E-Port Adapter or see
the E-Port Adapter Quick Setup Guide on support.dell.com.
•To remove a battery slice, see the documentation that shipped with your battery slice or on
support.dell.com.
10. Turn the computer topside up, open the display, and press the power button to ground the system board.
1.3 After Working On Your Computer
After you have completed the replacement procedures, ensure you connect the external devices, cards, cables, etc.
before turning on your computer.
NOTE: 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. Connect any external devices, such as a port replicator, or battery slice, and replace any cards, such as an
ExpressCard.
2. Connect any telephone or network cables to your computer.
3. Replace the battery. Slide the battery into the battery bay until it clicks into place and close the battery door.
4. Connect your computer and all attached devices to their electrical outlets.
5. Turn on your computer.

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2Bottom Access Panel
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions that shipped with your computer.
1
Captive Screw
2
Battery release slider latches (2)
2.1 Removing the Bottom Access Panel
1. Follow the procedures in Before Working on Your Computer.
2. Close the display and turn the computer upside down.
3. Remove the twenty-three M2.5 x 5-mm screws that secure the bottom access panel as indicated in the figure
above.
4. Loosen the single captive screw highlighted in the figure above.
5. Lift the bottom access panel to remove it from the base assembly.
NOTE: No snaps are used to attach the bottom access panel to the base. There is a gasket
attached to the perimeter of the bottom access panel, and this gasket might provide some
resistance during removal.
2.2 Replacing the Bottom Access Panel
1. Position the Bottom Access Panel into place.
NOTE:
Ensure the battery release slider latches on the bottom access panel are in their locked
positions (pushed toward center of chassis). See photo below for correct slider latches positions.
2
1

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Battery release latches in locked position
1. Tighten the single captive screw highlighted in the figure abovve
2. Replace and tighten the twenty-three M2.5 x 5-mm screws in the sequence identified in the figure above.
3. Follow the procedures in After Working on Your Computer.
3WLAN/WiMax Card
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions that shipped with your computer.
NOTICE: Insert a WLAN or WiMax card only into the slot labeled WLAN/WiMax.
3.1 Removing the WLAN/WiMax Card
1. Follow the procedures in Before Working on Your Computer.
2. Remove the Bottom Access Panel (see Removing the Bottom Access Panel).
1
WLAN/WiMax Card
2
M2x3 mm (1)
1
2

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1
Antenna cables (3)
2
WLAN/WiMax card
3
M2 x 3-mm screw
1. Disconnect the antenna cables from the card.
2. Remove the M2 x 3-mm screw. The card will pop up at a 45-degree angle.
3. Slide the card out of the card connector on the system board.
1
WLAN/WiMax card
2
Card connector
3.2 Replacing the WLAN/WiMax Card
NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the
connectors on the card and on the system board, and realign the card.
NOTICE: To avoid damage to the WLAN or WiMax card, ensure the cables are not under the card
when you replace it.
NOTICE: Insert a WLAN or WiMax card only into the slot labeled WLAN/WiMax.
1. Slide the card into the connector labeled WLAN/WiMax.
2. Press the card down and hold it in place.
3. Replace the M2 x 3-mm screw.
4. Connect the appropriate antenna cables to the card you are installing:
a. If the card has two triangles on the label (white and black), connect the white antenna cable to the
connector labeled "main" (white triangle), and connect the black antenna cable to the connector
labeled "aux" (black triangle). Secure the gray antenna cable in the plastic holder next to the card.
b. If the card has three triangles on the label (white, black, and gray), connect the white antenna cable
to the white triangle, connect the black antenna cable to the black triangle, and connect the gray
antenna cable to the gray triangle.
5. Replace the Bottom Access Panel (see Replacing the Bottom Access Panel).
6. Follow the procedures in After Working on Your Computer.

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4WWAN/FMC Card
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions that shipped with your computer.
NOTICE: Insert a WWAN card or FCM only into the slot shown in the picture below.
4.1 Removing a WWAN/FMC Card
1. Follow the procedures in Before Working on Your Computer.
2. Remove the Bottom Access Panel (see Removing the Bottom Access Panel).
1
WWAN/FMC Card
2
M2x3 mm (1)
3. Disconnect the antenna cables from the card.
4. Remove the M2 x 3-mm screw. The card pops up at a 45-degree angle.
1
2

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5. Slide the card out of the card connector on the system board.
1
WWAN card
2
Card connector
4.2 Replacing a WWAN/FMC Card
NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the
connectors on the card and on the system board, and realign the card.
NOTICE:
To avoid damage to the WWAN card, ensure the cables are not under the card when
you replace it.
NOTICE: Insert a WWAN card or FCM only into the slot labeled WWAN/WiMax.
1. Slide the card into the connector labeled WWAN/FCM.
2. Press the card down and hold it in place.
3. Replace the M2 x 3-mm screw.
4. Connect the white antenna cable to the connector labeled "main" (white triangle), and connect the black
antenna cable to the connector labeled "aux" (black triangle).
5. Replace the Bottom Access Panel (see Replacing the Bottom Access Panel).
6. Follow the procedures in After Working on Your Computer.
5WPAN (UWB) Card
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions that shipped with your computer.
NOTICE:
WPAN is a generic name for Ultra Wide Band (UWB) and Bluetooth® (BT). Insert a
WPAN card only into the slot labeled WPAN/UWB/FCM.
5.1 Removing a WPAN (UWB) Card
1. Follow the procedures in Before Working on Your Computer.
2. Remove the Bottom Access Panel (see Removing Bottom Access Panel).
3. Remove the WWAN/FMC card if present to fully expose the WPAN card (see Removing the WWAN/FMC Card).
4. Disconnect any cables from the card.
5. Remove the M2 x 3-mm screw. The card pops up at a 45-degree angle.

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1
WPAN/UWB card
6. Slide the card out of the card connector on the system board.
1
WPAN card
2
Card connector

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5.2 Replacing a WPAN (UWB) Card
NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the
connectors on the card and on the system board, and realign the card.
NOTICE: To avoid damage to the WPAN card, ensure the cables are not under the card when
you replace it.
NOTICE: Insert a WPAN card only into the slot labeled WPAN/UWB/FCM.
1. Slide the card into the connector labeled WPAN/UWB/FCM.
2. Press the card down and hold it in place.
3. Replace the M2 x 3-mm screw.
4. Connect any cables to the WPAN card.
5. Replace the WWAN/FMC Card if present (see Replacing the WWAN/FMC Card).
6. Replace the Bottom Access Panel (see Replacing the Bottom Access Panel).
7. Follow the procedures in After Working on Your Computer.
6RF Passthru Board (Optional)
6.1 Removing the RF Passthru Board
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions that shipped with your computer.
1. Follow the procedures in Before Working on Your Computer.
2. Remove the bottom access panel (see Removing the Bottom Access Panel).
3. Disconnect the 3 antenna connections on the RF Passthru board.
4. Disconnect the antenna connection from the RF Passthru board to the GPS module if present

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5. Disconnect the antenna connection from the RF Passthru board to the WWAN card if present
6. Disconnect the antenna connection from the RF Passthru board to the WLAN card if present
7. Remove the M2 x 3-mm screw that secures the RF Passthru board to the chassis.

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8. Gently lift the lower-left corner of the RF Passthru board, and remove the RF Passthru board by sliding it out
of the chassis socket.
6.2 Replacing the RF Passthru Board
1. Slide the RF Passthru into the chassis socket as shown.
2. Replace and tighten the M2 x 3-mm screw highlighted in the figure above.
3. Connect the antenna connections to the RF Passthru board.
4. Connect the antenna connections from the RF Passthru board to the GPS module (if present), WWAN card (if
present), and WLAN card (if present). Refer to figure above for connection locations.
5. Replace the bottom access panel (see Replacing the Bottom Access Panel).
6. Follow the procedures in After Working on Your Computer.
Close up reference of WLAN/WWAN/RF-Passthrough

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7Fan Assembly
7.1 Removing the Fan Assembly
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions that shipped with your computer.
1. Follow the instructions in Before Working on Your Computer.
2. Remove the bottom access panel (see Removing the Bottom Access Panel).
3. Remove the three M2.5 x 5-mm screws that secure the fan to the base assembly.
1
Fan
2
M2.5 x 5-mm screws (3)
3
Connection
THIS AREA INTENTIONALLY LEFT BLANK

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4. Disconnect the fan cable from the system board.
5. Lift the fan straight up to remove it.
7.2 Replacing the Fan Assembly
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions that shipped with your computer.
1. Insert the fan.
2. Align the screws holes in the fan with the screw holes in the base assembly.
3. Replace the three M2.5 x 5-mm screws to secure the fan to the base assembly.
4. Align the gasket on the fan cable to the cutout in the base chassis and slide into place.
5. Connect the fan cable to the system board.
6. Replace the bottom access panel (see Replacing the Bottom Access Panel).
7. Follow the procedures in After Working on Your Computer.

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8Processor Heatsink Assembly
8.1 Removing the Processor Heatsink Assembly
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions that shipped with your computer.
UMA Base shown (Discrete revision inset)
1
Captive screws (4)
2
Radiator
3
Processor plate
1. Follow the instructions in Before Working on Your Computer.
2. Remove the bottom access panel and fan assembly (see Removing the Fan Assembly).
3. In sequential order, loosen the four captive screws that secure the processor heatsink assembly to the system
board.