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Battery
A battery on the system board provides power backup for the real-time clock
and CMOS RAM. Chapter 5 provides information about replacing the
battery.
You can set the time for the clock and the CMOS values by using the system
BIOS Setup program, described in Chapter 3.
Speaker
A speaker is mounted on the system board. The speaker provides audible
error code information (beep codes) during the power-on self test (POST) if
the system cannot use the video interface. See Chapter 6 for beep code
information.
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