CMOS Clear Jumper
The jumper at pins 1, 2, and 3 controls whether settings stored in CMOS nonvolatile memory (NVRAM) are retained during a system reset. The jumper is used to restore the system’s CMOS and RTC to default values.
There are two methods to restore the default values.
Method 1
1.Hold the system's reset button down for five seconds.
2.While continuing to hold down the system's reset button, press the power button.
3.Release both the reset and power buttons at the same time.
Method 2
1.Observe the safety and ESD precautions at the beginning of this procedure.
2.Turn off all connected peripherals, turn off system power, and disconnect all AC power cords.
3.If the baseboard is installed in a system, remove access covers so that you have access to the baseboard.
4.Remove the memory module. See "Removing the Memory Module" on page 61.
5.Locate the configuration jumpers at the edge of the baseboard next to the memory expansion card connector (MECC).
6.Move the CMOS jumper from pins 1 and 2 to pins 2 and 3 (the Clear CMOS memory position).
7.If the baseboard is installed in a system, reinstall the access covers, connect the power cords, and turn on the system for the change to take effect.
8.You may need to repeat these steps to move the jumper back to its original setting, depending on the jumper function.
9.Wait for POST to complete and for the messages “NVRAM cleared by jumper” and “Press F1 to resume, Press F2 to Setup” to be displayed. This automatically reprograms CMOS and RTC to their default settings, except for the password.
10.Enter Setup and make any changes necessary (for example, changing the boot device). Press F10 to save the new Setup configuration and exit Setup.
11.Turn off the system, and disconnect all AC power cords from the system.
12.Move the jumper from pins 2 and 3 back to pins 1 and 2 (the Protect CMOS memory position).
13.If the baseboard is installed in a system, reinstall the access covers, connect the power cords, and turn on the system for the change to take effect.
14.Run BIOS Setup or the SSU to verify the correct settings. See Chapter 3.
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