Asus AP1720-E2 - Manual (Page 94)

Chapter 4: Motherboard info 4-6
5. Clear RTC RAM (3-pin CLRTC1)
This jumper allows you to clear the Real Time Clock (RTC) RAM in
CMOS. The RAM data in CMOS, that include system setup information
such as system date, time, and system setup parameters, and
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 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. Re-install the battery.
5. Plug the power cord and turn ON the computer.
6. Hold down the 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!
NCCH-DL
®
NCCH-DL Clear RTC RAM
CLRTC1
Normal
(Default) Clear CMOS
1 2 2 3