Aaeon EMB-Q87A User Manual

Aaeon EMB-Q87A User Manual Manual pdf 20 page image

EMB-Q87A2-122.6 Jumpers1. Clear RTC RAM (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 erasingthe CMOS RTC RAM data. The onboard button cell battery powers the RAMdata in CMOS, which include system setup information such as systempasswords.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 onpins 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 key during the boot process and enter BIOS setupto reenter data.CAUTION! Except when clearing the RTC RAM, never remove the cap onCLRTC jumper default position. Removing the cap will cause system bootfailure!NOTES:• If the steps above do not help, remove the onboard battery and move thejumper again to clear the CMOS RTC RAM data. After clearing the CMOS,reinstall the battery.• You do not need to clear the RTC when the system hangs due tooverclocking. For system failure due to overclocking, use the CPU ParameterRecall (C.P.R) feature. Shut down and reboot the system so the BIOS canautomatically reset parameter settings to default values.EMB-Q87A Clear RTC RAM1 22 3RTC Batt.(Default)Clear CMOSCLRTC