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Before You Begin: Dell Latitude D400 Service Manual

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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 computer's 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.

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.
  1. If the computer is connected to a docking device (docked), undock it.

  2. Disconnect the computer from the electrical outlet.

  3. To avoid possible damage to the system board, wait 10 to 20 seconds and then disconnect any attached devices.

  4. Disconnect all other external cables from the computer.

  5. Remove any installed PC Cards from the PC Card slot.

  6. Close the display and turn the computer upside down on a flat work surface.

NOTICE: To avoid damaging the system board, you must remove the main battery before you service the computer.
  1. Slide and hold the battery-bay latch release on the bottom of the computer, and then remove the battery from the bay.


Recommended Tools

The procedures in this manual require the following tools:

  • Phillips screwdriver

  • Flat-blade screwdriver

  • Small plastic scribe

  • Flash BIOS update program floppy disk or CD


Computer Orientation

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 identification chart provides the number of screws and their sizes.

keyboard

(two each)


      1428U

modem

(one each)


      1428U

hard drive

(four each)


      2864D

display removal

(six each)


      4911U

display bezel

(six each)


      7166P

display latch

(two each)


      5H953

palm rest

(thirteen each)


      4911U

(two each)
 


      5H953

fan

(three each)


      1428U

system board

(six each)


      1428U

(one each, if a BIOS card is present)



      1428U

speakers

(two each)


      4911U

 

 


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