Dell Latitude D631 User manual

Dell™Latitude™D631ServiceManual
Model PP18L
Notes, Notices, and Cautions
Information in this document is subject to change without notice.
©2007DellInc.Allrightsreserved.
Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.
Trademarks used in this text: Dell, the DELL logo, and Latitude are trademarks of Dell Inc.; Microsoft and Windows are registered trademarks of Microsoft Corporation; Bluetooth is a
registered trademark owned by Bluetooth SIG, Inc. and is used by Dell under license.
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.
April 2007 Rev. A00
Before You Begin
Using Cards
Media Bay Devices
Hard Drive
Hinge Cover
Keyboard
Memory
Display Assembly
Internal Card With Bluetooth®Wireless Technology
Communications Cards
Coin-Cell Battery
Palm Rest
Modem
Processor Thermal-Cooling Assembly
Processor
PC Card Reader
Speaker
System Board
Fan
Flashing the BIOS
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.

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Before You Begin
Dell™Latitude™D631ServiceManual
Recommended Tools
Turning Off Your Computer
Before Working Inside Your Computer
This section 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.
lYou have read the safety information in the Dell Product Information Guide.
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Small plastic scribe
l5-mm hex nut driver
lFlash BIOS update program CD
lProcessor extraction tool
Turning Off Your Computer

1. Shut down the operating system:
a. Save and close all open files and exit all open programs.
b. In the Microsoft®Windows®XP operating system, click Start®Shut Down®Shut down.
In Microsoft®WindowsVista™,click the Windows Vista Start button , click the arrow in the lower-right corner of the Start menu as shown
below, and then click Shut Down.
The computer turns off after the operating system shutdown process is complete.

2. Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut
down your operating system, press and hold the power button for about 4 seconds to turn them off.
Before Working Inside Your Computer
Use the following safety guidelines to help protect your computer from potential damage and to help ensure your own personal safety.



NOTICE: To avoid losing data, save and close all open files and exit all open programs before you turn off your computer.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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: 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.


1. Ensure that the work surface is flat and clean to prevent the computer cover from being scratched.

2. Save and close any open files, exit any open programs, then shut down the operating system and turn off all attached devices:
In the Microsoft®Windows®Vista™operatingsystem,click Start , click the arrow icon, and then click Shut Down.
In the Microsoft Windows XP operating system, click Start®Shut Down®Shut down.
The computer turns off after the operating system shutdown process finishes.

3. Disconnect your computer and all attached devices from their electrical outlets.

4. Disconnect all external cables from the computer.

5. Close the display and turn the computer upside down on a flat work surface.

6. Remove the battery:
a. Slide the two battery bay release latches on the bottom of the computer toward the sides of the computer until they are engaged.
b. Grasp the battery by the battery tab, and then slide the battery horizontally toward the front of the computer.
c. Lift the battery from the battery bay.

7. Turn the computer over and press the power button to ground the system board.

8. Remove the PC Card or ExpressCard, if installed, from the PC Card slot (see Removing a PC Card or Blank).

9. Remove the smart card, if installed, from the smart card slot (see Removing a Smart Card).
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
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: 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 pull tab, not on the cable itself. Some cables have connectors with locking
tabs; before disconnecting this type of cable, press inward on the locking tabs to release the connector. When connecting or disconnecting a cable,
ensure that the connectors are correctly oriented and aligned to avoid damage to the connector and/or the connector's pins.
NOTICE: To avoid damaging the computer, perform the following steps before you begin working inside the computer.
NOTICE: To avoid losing data, save and close any open files and exit any open programs before you 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.
NOTICE: To disconnect a network cable, first unplug the cable from your computer, and then unplug it from the network device.
1
battery
2
battery bay release latch (2)
3
battery tab

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Flashing the BIOS
Dell™Latitude™D631ServiceManual
Flashing the BIOS From a CD
Flashing the BIOS From the Hard Drive
If a BIOS-update program CD is provided with the new system board, flash the BIOS from the CD. If you do not have a BIOS-update program CD, flash the
BIOS from the hard drive.
Flashing the BIOS From a CD

1. Ensure that the AC adapter is plugged in and that the main battery is installed properly.

2. Insert the BIOS-update program CD, and restart the computer.
Follow the instructions that appear on the screen. The computer continues to boot and updates the new BIOS. When the flash update is complete, the
computer automatically reboots.

3. Press <F2> during POST to enter the system setup program.

4. Press <Alt> and <F> to reset the computer defaults.

5. Press <Esc>, select Save changes and reboot, and press <Enter> to save configuration changes.

6. Remove the flash BIOS-update program CD from the drive and restart the computer.
Flashing the BIOS From the Hard Drive

1. Ensure that the AC adapter is plugged in, the main battery is properly installed, and a network cable is attached.

2. Turn on the computer.

3. Locate the latest BIOS update file for your computer at support.dell.com.

4. Click Download Now to download the file.

5. If the Export Compliance Disclaimer window appears, click Yes, I Accept this Agreement.
The File Download window appears.

6. Click Save this program to disk and then click OK.
The Save In window appears.

7. Click the down arrow to view the Save In menu, select Desktop, and then click Save.
The file downloads to your desktop.

8. 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.

9. Double-click the file icon on the desktop and follow the instructions on the screen.
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
NOTE: If you use a BIOS-update program CD to flash the BIOS, set up the computer to boot from a CD before inserting the CD.

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Internal Card With Bluetooth®Wireless Technology
Dell™Latitude™D631ServiceManual


If you ordered an internal card with Bluetooth wireless technology with your computer, it is already installed.

1. Follow the procedures in Before You Begin.

2. Remove the hinge cover (see Hinge Cover).

3. Remove the card cable from its routing guide.

4. While grasping the card cable with one hand, press slightly downward (with a plastic scribe) on the back plastic securing tab (shown below) to release
the cable end of the card.

5. Continue to grasp the card cable with one hand while prying the card out from underneath the metal tab with the other hand.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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 the back of the computer.
NOTICE: To avoid damaging the system board, you must remove the main battery before you begin working inside the computer (see Before Working
Inside Your Computer).
NOTICE: Be careful when removing the card to avoid damaging the card, card cable, or surrounding components.
1
connector wire
2
plastic scribe
3
back plastic securing tab
4
metal securing tab
5
front plastic securing tab
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1
cable
2
card connector
3
card
4
metal tab
5
plastic scribe



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6. Lift the card from the compartment, ensuring that you do not pull on the card cable with excessive force.

7. Disconnect the card from the cable and remove the card from the computer.
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PC Card Reader
Dell™Latitude™D631ServiceManual


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1. Follow the instructions in Before You Begin.
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2. Remove any installed media bay device (see Media Bay Devices).

3. Remove the hinge cover (see Hinge Cover).

4. Remove the keyboard (see Removing the Keyboard).

5. Remove the palm rest (see Palm Rest).

6. Remove the four M2 x 3-mm screws that secure the PC Card reader to the computer.

7. Use the pull tab to disconnect the PC Card reader connector from the system board.
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
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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 the back of the computer.
1
PC Card reader
2
M2 x 3-mm screws (4)
3
pull tab
NOTICE: To avoid damaging the PC Card reader connector, do not rotate or rock the connector as you remove it. Use firm and even pressure to lift the
pull tab vertically.

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Coin-Cell Battery
Dell™Latitude™D631ServiceManual



1. Follow the procedures in Before You Begin.

2. Remove the hinge cover (see Hinge Cover).

3. Remove the keyboard (see Removing the Keyboard).

4. Remove the battery cable connector from the connector on the system board.

5. Being careful not to break the plastic, slightly raise the corner of the plastic arm above the battery.

6. While holding the plastic arm slightly up, grasp the battery and pull it out of the battery compartment.
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
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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 the back of the computer.
NOTICE: To avoid damaging the system board, you must remove the main battery before you begin working inside the computer (see Before Working
Inside Your Computer).
1
battery cable connector
2
coin-cell battery
3
plastic arm

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Processor
Dell™Latitude™D631ServiceManual
Removing the Processor
Installing the Processor
Removing the Processor



1. Follow the instructions in Before You Begin.

2. Remove any installed media bay device (see Media Bay Devices).

3. Remove the hinge cover (see Hinge Cover).

4. Remove the keyboard (see Removing the Keyboard).

5. Remove the palm rest (see Palm Rest).

6. Remove the processor thermal-cooling assembly (see Removing the Processor Thermal-Cooling Assembly).

7. To loosen the ZIF socket, use a small, flat-blade screwdriver and rotate the ZIF-socket cam screw counterclockwise until it comes to the cam stop.
The ZIF-socket cam screw secures the processor to the system board. Take note of the arrow on the ZIF-socket cam screw.

8. Remove the processor.
Installing the Processor
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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 the back of the computer.
NOTICE: To prevent intermittent contact between the ZIF-socket cam screw and the processor when removing or replacing the processor, press to
apply slight pressure to the center of the processor while turning the cam screw.
NOTICE: To avoid damage to the processor, hold the screwdriver so that it is perpendicular to the processor when turning the cam screw.
NOTICE: When removing the processor, pull it straight up. Be careful not to bend the pins on the processor.
1
ZIF-socket cam screw
2
ZIF socket
3
pin-1 corner of processor




1. Align the pin-1 corner of the processor so that it points to the triangle on the system board, and insert the processor into the ZIF socket.
When the processor is correctly seated, all four corners are aligned at the same height. If one or more corners of the processor are higher than the
others, the processor is not seated correctly.

2. Tighten the ZIF socket by turning the cam screw clockwise to secure the processor to the system board.

3. Peel the backing off the thermal cooling pad and adhere the pad to the portion of the thermal-cooling assembly that covers the processor.

4. Replace the processor thermal-cooling assembly (see Processor Thermal-Cooling Assembly).

5. Replace the palm rest (see Palm Rest).

6. Replace the keyboard (see Replacing the Keyboard).

7. Replace the hinge cover (see Hinge Cover).

8. Replace the media bay device (see Media Bay Devices).

9. Replace the battery.

10. Update the BIOS using a flash BIOS-update program CD (see Flashing the BIOS).
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
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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 the back of the computer.
NOTICE: Ensure that the cam lock is in the fully open position before seating the processor. Seating the processor properly in the ZIF socket does not
require force.
NOTICE: A processor that is not properly seated can result in an intermittent connection or permanent damage to the processor and ZIF socket.
NOTICE: To prevent intermittent contact between the ZIF-socket cam screw and the processor when removing or replacing the processor, press to
apply slight pressure to the center of the processor while turning the cam screw.
NOTE: If necessary, ensure that you reconnect the coin-cell battery (see Coin-Cell Battery) before you replace the keyboard.