How to Clear the CMOS

Use this procedure to clear the server’s CMOS settings in the case of a system hang.

For example, if the server hangs because of incorrect settings and will not boot, use this procedure to invalidate the settings and reboot with the default settings.

1. Prepare the server for service. See How to Prepare for Service.
2. Remove the AC power cord from the rear of the server.
3. Remove the server cover. See How to Remove the Server Cover.
4. Remove the battery for 30 seconds, then reinsert it.

   Use the procedure for replacing the system battery. See Replacing the System Battery (CRU).

5. Install the server cover. See How to Install the Server Cover.
6. Prepare the server for operation. See How to Prepare for Operation.
7. Reinsert the AC power cord.