Dell PowerEdge M820 (for PE VRTX) - Manual (Page 70)

Troubleshooting the 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 server module from the enclosure.
2. Open the server module.
3. Clear the server module NVRAM.
4. If there is a still a problem with the server module, remove and reinstall the server module in the
enclosure.
5. Turn on the server module.
6. Run the appropriate diagnostic test. For more information, see
Using system diagnostics .
If the tests fail, see Getting Help .
Troubleshooting the NVRAM backup battery
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 server module configuration, date, and time information in the NVRAM when
the server module 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 server module without a battery; however, the server module configuration
information maintained by the battery in NVRAM is erased each time you remove power from the server
module. Therefore, you must re-enter the system configuration information and reset the options each
time the server module boots until you replace the battery.
1. Re-enter the time and date through the System Setup.
2. Remove the server module from the enclosure for at least one hour.
3. Install the server module 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 server module 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 server module’s time to speed up or slow down. If the
server module 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.
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