Jumpers - Aaeon EMB-Q87B Manual

2.6

Jumpers

1. Clear RTC RAM (3-pin CLRTC)
This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS.
You can clear the CMOS memory of 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.
EMB-Q87B Clear RTC RAM
To erase the RTC RAM:
1. Turn OFF the computer and unplug the power cord.
2. 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.
3. Plug the power cord and turn ON the computer.
4. Hold down the <Del> key during the boot process and enter BIOS setup
to reenter data.
CAUTION! Except when clearing the RTC RAM, never remove the cap on
CLRTC jumper default position. Removing the cap will cause system boot
failure!
NOTES:
• If the steps above do not help, remove the onboard battery and move the
• You do not need to clear the RTC when the system hangs due to
2-12
jumper again to clear the CMOS RTC RAM data. After clearing the CMOS,
reinstall the battery.
overclocking. For system failure due to overclocking, use the CPU Parameter
Recall (C.P.R) feature. Shut down and reboot the system so the BIOS can
automatically reset parameter settings to default values.
EMB-Q87B