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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 computer's 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-specified parameters in the BIOS. If possible, make a copy of this information before 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

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

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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