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Chapter 2: Hardware information
2.7 Jumper
Clear RTC RAM (CLR_CMOS)
This jumper allows you to clear the Real Time Clock (RTC) RAM in
CMOS. You can clear the CMOS memory of date, time, and system setup
parameters by erasing the CMOS RTC RAM data. The RAM data in
CMOS, that include system setup information such as system passwords,
is powered by the onboard button cell battery.
To erase the RTC RAM:
1. Turn OFF the computer and unplug the power cord.
2. Remove the battery.
3. Short the jumper by placing the jumper cap to pins 1-2 for a few
seconds.
4. Replace the jumper cap to pins 2-3.
5. Re-install the battery.
6. Plug the power cord and turn ON the computer.
7. Hold down the <Del> key during the boot process and enter BIOS
setup to re-enter data.
Figure 2-20 Clear RTC RAM
P4B-LX
P4B-LX Clear RTC RAM
CLR_CMOS
Clear CMOS Normal
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