dell latitude c400 User Manual

							Cooling Fan : Dell Latitude C400 Service Manual 
 
1 cooling fan
2 M2.5 x 6-mm screws (3)
3 fan cable
4 fan extender cable
5.  Remove the fan cable from the fan extender cable that runs under the sys\
tem  board. 
6.  Remove the three M2.5 x 6-mm screws that secure the cooling fan. 
7.  Lift out the cooling fan. 
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							Cooling Fan : Dell Latitude C400 Service Manual 
 
 
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							Reserve Battery : Dell Latitude C400 Service Manual 
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Reserve Battery 
Dell™ Latitude™ C400 Service Manual 
  Removing the Reserve Battery
  Replacing the Reserve Battery
Removing the Reserve Battery
NOTICE: The reserve battery provides power to the computers RTC and 
NVRAM when the computer is turned off. Removing the battery causes the 
computer to lose the date and time information as well as all user-speci\
fied 
parameters in the BIOS. If possible, make a copy of this information bef\
ore you 
remove the reserve battery. 
NOTICE: Disconnect the computer and any attached devices from electrical 
outlets, and remove any installed batteries. 
NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by 
touching an unpainted metal surface on the computer. 
NOTICE: Read Preparing to Work Inside the Computer before performing the 
following procedure. 
1.  Remove the 
hard drive. 
2.  Remove the 
keyboard. 
3.  Remove the 
display assembly. 
4.  Remove the 
palm rest. 
Reserve Battery Removal 
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							Reserve Battery : Dell Latitude C400 Service Manual 
 
1 reserve battery connector on system board
2 reserve battery cable
3 reserve battery
5.  Disconnect the reserve battery cable from the system board connector. 
6.  Pry the reserve battery free from the system board. The reserve battery \
is  attached to the system board with a piece of adhesive tape. 
7.  Remove any remnants of the adhesive tape from the system board. 
Replacing the Reserve Battery
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							Reserve Battery : Dell Latitude C400 Service Manual 
1.  Connect the reserve battery cable to the system board connector. 
2.  Press the reserve battery into place on the system board. 
3.  Update the BIOS using a flash BIOS update program floppy disk or CD. For\
 instructions on how to flash the BIOS, see 
Flashing the BIOS. 
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							Flashing the BIOS : Dell Latitude C400 Service Manual 
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Flashing the BIOS 
Dell™ Latitude™ C400 Service Manual 
Perform the following steps to update the BIOS:1.  Make sure that the AC adapter is plugged in and that the main battery is\
  installed properly. 
2.  Turn on the computer. The following error message appears: 
System hardware failures: #0010 
Strike the F1 key to shutdown 
3.  Instead of pressing , insert the Flash BIOS update floppy disk or CD\
 into  the appropriate drive and press , and then press . The computer \
displays the following message on the screen: 
Failure override 
Processor update failure. Reload current BIOS 
Strike the F1 key to continue, F2 to run the setup utility. 
4.  Press . The computer continues to boot and updates the new BIOS. 
5.  Press  to enter the system setup program and reset the boot sequence\
  with the appropriate drive, if required. 
6.  Press  to exit the system setup program. 
7.  Remove the Flash BIOS update floppy disk or CD from the drive and restar\
t the  computer. 
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							Flashing the BIOS : Dell Latitude C400 Service Manual 
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							Audio Board : Dell Latitude C400 Service Manual 
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Audio Board 
Dell™ Latitude™ C400 Service Manual 
  Removing the Audio Board
  Replacing the Audio Board
Removing the Audio Board
NOTICE: Disconnect the computer and any attached devices from electrical 
outlets, and remove any installed batteries. 
NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by 
touching an unpainted metal surface on the computer. 
NOTICE: Read Preparing to Work Inside the Computer before performing the 
following procedure. 
1.  Remove the 
hard drive. 
2.  Remove the 
keyboard. 
3.  Remove the 
display assembly. 
4.  Remove the 
palm rest. 
Audio Board Removal 
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							Audio Board : Dell Latitude C400 Service Manual 
 
1 M2 x 4-mm screws (2)
2 audio board shield
3 audio board
5.  Remove the two M2 x 4-mm screws from the audio board shield, and remove \
 the shield. 
6.  Pull the audio board up out of its connector. 
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							Audio Board : Dell Latitude C400 Service Manual 
Replacing the Audio Board
The audio board can be easily misaligned. When replacing it, first align\
 the two screw 
holes in the board with the holes in the bosses. Then, as you press the \
audio board 
into the connector, sight sideways between the audio board and the syste\
m board to 
ensure that all pins on the audio board connector are headed correctly i\
nto the system 
board connector.
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