Replacing the battery

The battery provides power for the system real-time clock and CMOS RAM, which holds the system configuration information.

If your battery is failing you may notice your system clock slowing down and giving you the incorrect time. If so, open the Setup utility and write down all the values in the menus and submenus before replacing the battery. Replacing the battery resets the Setup utility to its default values.

To replace the battery

1.Restart the computer and start the Setup utility program by pressing F1 when you are prompted to do so.

2.Write down the CMOS values from the Main Setup utility screen so you can reenter them after you replace the battery. For more information about the Setup utility program, see “BIOS Setup Utility” on page 43

3.Turn off the system and disconnect the power cord.

4.Open the case, observing the “Static Electricity Precautions” on page 2.

5.Locate the battery on the system board (see “System board” on page 8). The battery is circular and has the positive pole mark (+) on the top.

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

Caution!

There is a danger of explosion if the battery is incorrectly replaced. Replace the battery only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s instructions.

System Components 39