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## How to Clear the CMOS Settings Using the Battery

| Caution - Loss of customized information. Removing the battery erases customized settings stored in the battery-backed CMOS. Erasing custom settings might render your server inoperable within your environment.

1. Prepare the server for service. See How to Prepare the Server for Service.
2. Use the battery replacement procedure to temporarily remove the battery from the server. See Replacing the CMOS Battery (CRU).
3. To clear the battery-backed CMOS settings, remove the system battery for approximately 10 seconds. See Replacing the CMOS Battery (CRU).
4. After 10 seconds install the battery.
5. Prepare the server for operation. See How to Prepare the Server for Operation.

Next Steps

- If necessary, access the BIOS Setup utility to customize the settings for your environment. See Configuring the System Using the BIOS Setup Utilities.

See Also

- List of Customer Replaceable Units and Field Replaceable Units

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