dell latitude d400 User Manual

							Dell Latitude D400 Service Manual
Dell™ Latitude™ D400 Service Manual
Before You Begin
Preparing to Work Inside the Computer 
Recommended Tools 
Computer Orientation 
Screw Identification 
Using the Dell Diagnostics
When to Use the Dell Diagnostics 
Features of the Dell Diagnostics 
Starting the Dell Diagnostics 
System Components
Keyboard
Removing the Keyboard 
Installing the Keyboard 
Memory
Installing a Memory Module Under the Memory
Module/Modem Cover 
Installing a Memory Module Under the Keyboard 
Mini PCI Card
Modem
Hard Drive
Removing the Hard Drive 
Installing the Hard Drive 
Removing the Interposer 
Replacing the Interposer 
Docking Doors
Removing the Docking Doors 
Installing the Docking Doors 
Bluetooth™
Display
Removing the Display Assembly 
Replacing the Display Latch 
Palm Rest
Cooling Fan
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							Dell Latitude D400 Service Manual
Touch Pad
System Board
Removing the System Board 
Replacing the System Board 
Reserve Battery
Flashing the BIOS
Speakers
Battery Latch
Pin Assignments for I/O Connectors
USB Connector 
Video Connector 
Serial Connector 
Dell D/Bay Connector 
Mini Recommended Spares List
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.

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 trademark owned by 
Bluetooth SIG, Inc. and is used by Dell Inc. under license.
Other trademarks and trade names may be used in this document to refer t\
o 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.
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							Dell Latitude D400 Service Manual
Model PPT
October 2003     Rev. A02
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							Before You Begin: Dell Latitude D400 Service Manual
Back to Contents Page 
Before You Begin 
Dell™ Latitude™ D400 Service Manual
  Preparing to Work Inside the Computer
  Recommended Tools
  Computer Orientation
  Screw Identification
Preparing to Work Inside the Computer
 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. Read and follow the safety instructions\
 
in the System Information Guide that came with the computer.
 CAUTION: To prevent static damage to components inside your 
computer, discharge static electricity from your body before you touch 
any of your computers electronic components. You can do so by 
touching an unpainted metal surface.
 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 microprocessor by 
its edges, not by its pins.
NOTICE: To avoid damaging the computer, perform the following steps before 
you begin working inside the computer. 
1.  Ensure that the work surface is flat and clean to prevent scratching the\
  computer cover. 
2.  Save any work in progress and exit all open programs. 
3.  Turn off the computer and all attached devices. 
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							Before You Begin: Dell Latitude D400 Service Manual
NOTE: Ensure that the computer is off and not in a power management mode. 
If you cannot shut down the computer using the computer operating system\
, 
press and hold the power button for 4 seconds. 
4.  If the computer is connected to a docking device (docked), undock it. \
5.  Disconnect the computer from the electrical outlet. 
6.  To avoid possible damage to the system board, wait 10 to 20 seconds and \
then  disconnect any attached devices. 
7.  Disconnect all other external cables from the computer. 
8.  Remove any installed PC Cards from the PC Card slot. 
9.  Close the display and turn the computer upside down on a flat work surfa\
ce. 
NOTICE: To avoid damaging the system board, you must remove the main 
battery before you service the computer. 
10.  Slide and hold the battery-bay latch release on the bottom of the comput\
er, and  then remove the battery from the bay. 
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							Before You Begin: Dell Latitude D400 Service Manual
 
Recommended Tools
The procedures in this manual require the following tools:
l     Phillips screwdriver
l     Flat-blade screwdriver
l     Small plastic scribe
l     Flash BIOS update program floppy disk or CD
Computer Orientation
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							Before You Begin: Dell Latitude D400 Service Manual
 
1 back
2 right
3 front
4 left
Screw Identification
When you are removing and replacing components, photocopy Screw Identification 
as a tool to lay out and keep track of the screws. The screw identificat\
ion chart 
provides the number of screws and their sizes.
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							Before You Begin: Dell Latitude D400 Service Manual
 
keyboard
(two each)
      1428U modem
(one each)      1428Uhard drive
(four each)      2864D
display removal
(six each)
      4911U display bezel
(six each)      7166Pdisplay latch
(two each)      5H953
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							Before You Begin: Dell Latitude D400 Service Manual
palm rest
(thirteen each)
      4911U
(two each)
 
      5H953fan
(three each)
      1428U
system board
(six each)      1428U
(one each, if a BIOS card is present)
 
      1428U
speakers
(two each)
      4911U  
 
Back to Contents Page
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