Instruction Manual

2-20 Chapter 2: Hardware information

M3N-H/HDMI

M3N-H/HDMI Clear RTC RAM

Disable

(Default)

Enable

CLRTC

2.6 Jumper

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 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. 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 re-enter data.

Except when clearing the RTC RAM, never remove the cap on CLRTC jumper

default position. Removing the cap will cause system boot failure!

If the steps above do not help, remove the onboard battery and move the

jumper again to clear the CMOS RTC RAM data. After the CMOS clearance,

reinstall the battery.

• You do not need to clear the RTC when the system hangs due to

overclocking. For system failure due to overclocking, use the C.P.R. (CPU

Parameter Recall) feature. Shut down and reboot the system so the BIOS

can automatically reset parameter settings to default values.

• Due to the chipset limitation, AC power off is required prior using C.P.R.

function. You must turn off and on the power supply or unplug and plug the

power cord before reboot the system.