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 system board to ensure that all pins on the audio board connector are headed correctly into the system board connector. Dell Latitude C400 Service Manual J Removing the System Board Replacing the System Board The system board's BIOS chip contains the service...

Reserve Battery Removal

Reserve battery connector on system board 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 Keyboard

Place the keyboard face-down on the palm rest, with the keyboard flex cable pointing toward the back of the computer. (J) NOTICE To avoid damage to the connector pins, press the keyboard flex cable connector evenly into the interface connector on the system board, and do not reverse the keyboard connector. 3. Connect the keyboard flex cable to its interface connector on the system board. To aid with proper flex cable connection, a white locator line has been added near the end of the flex...

Removing the Reserve Battery

Q 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. (J) NOTICE Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries. (J) NOTICE To avoid ESD, ground yourself by using a...