User manual

29 Chapter 1 Product Information
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 onboard button
cell battery powers the RAM data in CMOS, which include system setup
information such as system passwords.
To erase the RTC RAM:
1. Turn OFF the computer and unplug the power cord.
2. Remove the onboard battery.
3. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the
cap on pins 2-3 for about 5~10 seconds, then move the cap back to
pins 1-2.
4. Reinstall the battery.
5. Plug the power cord and turn ON the computer.
6. Hold down the <Del> key during the boot process and enter BIOS
setup to re-enter data.
Figure 1.7: Clear RTC RAM
Caution! Except when clearing the RTC RAM, never remove
the cap on CLRTC jumper default position. Removing
the cap will cause system boot failure!
R
P5B-VM DO
CLRTC
Normal
Clear CMOS
(Default)
12 23
P5B-VM DO Clear RTC RAM