4Remove the left side cover panel. (See “Removing the side cover” on page 18 and “Preventing static electricity discharge” on page 15.)

5Locate the battery on the system board (see “System board” on page 6). The battery is circular and has the positive pole mark (+) on the top.

6Using a small, flat-bladed screwdriver, carefully remove the battery from its socket on the system board.

7Press the new battery in the socket with the positive pole up. Be sure you have pressed the battery down far enough for it to contact the base of the socket (it should snap into place).

8Close the case by following the instructions on page 20.

9Reconnect peripherals, the modem cord, and the power cord, then turn on the system.

10If the CMOS data is not correct, change the information in the BIOS Setup utility using the data you recorded in Step 2.

Troubleshooting the battery installation

If you have problems after installing the new battery, try each of the items listed below:

■Turn off the computer and make sure that all exterior cables are attached and secured to the correct connectors.

■Make sure that all power switches are on. If the computer is plugged into a power strip or surge protector, make sure it is turned on also.

■Enter the BIOS Setup utility and compare the settings on the screen with your notes or the system hardware manuals. Correct any discrepancies.

48Replacing and Adding System Components