Asus P4B-LX Motherboard DIY Troubleshooting Guide - Page 36
Jumper - ram
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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 key during the boot process and enter BIOS setup to re-enter data. P4B-LX P4B-LX Clear RTC RAM Figure 2-20 Clear RTC RAM CLR_CMOS 12 23 Clear CMOS Normal 2-16 Chapter 2: Hardware information