3Com DK8X user manual CN32 Clear Cmos Header

Chapter 2 Hardware Installation

CN32: Clear CMOS Header

The onboard button cell battery powers the CMOS RAM. It contains all the BIOS setup information. Keep the jumper connected to pins 1-2 (Default) to retain the RTC data as shown below.

			1-2	2-3
1	2	3	Normal (Default)	Clear CMOS

Under certain circumstances, you will need to reset system settings. Follow these instructions to clear the CMOS RTC data:

1.Turn off the computer.

2.Short pins 2 and 3 with a jumper for a few seconds.

3.Replace the jumper to pins 1 and 2.

4.Turn on your computer by pressing the power-on button.

5.Hold down <F2> during boot and select either <Load Optimal Defaults> or <Load Failsafe Defaults> in the “Exit” section. Then go through the BIOS setup to re-enter user preferences. Refer to Chapter 2 BIOS SETUP for more information.

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Hardware Installation 2-3