Dell M820 Troubleshooting The Blade System Board, Troubleshooting The NVRAM Backup Battery

Troubleshooting The Blade System Board

CAUTION: Many repairs may only be done by a certified service technician. You should only

perform troubleshooting and simple repairs as authorized in your product documentation, or as

directed by the online or telephone service and support team. Damage due to servicing that is

not authorized by Dell is not covered by your warranty. Read and follow the safety instructions

that came with the product.

1. Remove the blade from the enclosure.

2. Open the blade.

3. Clear the blade NVRAM.

4. If there is a still a problem with the blade, remove and reinstall the blade in the enclosure.

5. Turn on the blade.

6. Run the appropriate diagnostic test. For more information, see Using System Diagnostics.

If the tests fail, see Getting Help.

CAUTION: Many repairs may only be done by a certified service technician. You should only

perform troubleshooting and simple repairs as authorized in your product documentation, or as

directed by the online or telephone service and support team. Damage due to servicing that is

not authorized by Dell is not covered by your warranty. Read and follow the safety instructions

that came with the product.

The battery maintains the blade configuration, date, and time information in the NVRAM when the blade

is turned off. You may need to replace the battery if an incorrect time or date is displayed during the boot

routine.

You can operate the blade without a battery; however, the blade configuration information maintained by

the battery in NVRAM is erased each time you remove power from the blade. Therefore, you must re-

enter the system configuration information and reset the options each time the blade boots until you

replace the battery.

1. Re-enter the time and date through the System Setup.

2. Remove the blade from the enclosure for at least one hour.

3. Install the blade in the enclosure.

4. Enter the System Setup.

If the date and time are not correct in the System Setup, replace the battery. If the problem is not

resolved by replacing the battery, see Getting Help.

NOTE: If the blade is turned off for long periods of time (for weeks or months), the NVRAM may

lose its system configuration information. This situation is caused by a defective battery.

NOTE: Some software may cause the blade’s time to speed up or slow down. If the blade

operates normally except for the time maintained by the System Setup, the problem may be

caused by a software rather than by a defective battery.