Dell XPS 420 owner manual Replacing the Coin-Cell Battery, 170

book.book Page 170 Tuesday, November 27, 2007 10:29 AM

3Align the screw holes on the I/O panel with the screw holes on the chassis, and replace the two screws.

4Reconnect the cable that attaches the power button to the I/O panel.

5Reconnect the 1394 cable, and audio cable (if it exists and you had removed it).

6Reconnect the control-panel cable to the I/O panel connector.

7Replace the front bezel by aligning the six tabs on the corresponding slots on the front chassis and snapping it back into place. Replace the two screws that secure the bezel to the bottom of the chassis.

8Replace the processor airflow shroud (see "Installing the Processor Airflow Shroud Assembly" on page 149) and the Processor fan assembly (see "Installing the Processor Fan Cage" on page 150 and "Installing the Processor Fan" on page 152).

9Connect the card fan assembly (see "Installing the Card Fan" on page 154)to the system board.

10Replace the computer cover (see "Replacing the Computer Cover" on page 172).

Coin-Cell Battery

Replacing the Coin-Cell Battery

CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.

NOTICE: 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 on the computer.

Acoin-cell battery maintains computer configuration, date, and time information. The battery can last several years. If you have to repeatedly reset time and date information after turning on the computer, replace the battery.

CAUTION: A new battery can explode if it is incorrectly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions.

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Removing and Installing Parts