Dell PowerEdge M820 Owner's Manual

Also see for PowerEdge M820 Systems: Manual Command reference guide Owner's manual Information update Release notes

Contents

Dell PowerEdge M820 Owner's Manual Manual pdf 71 page image

Troubleshooting The Blade System BoardCAUTION: Many repairs may only be done by a certified service technician. You should onlyperform troubleshooting and simple repairs as authorized in your product documentation, or asdirected by the online or telephone service and support team. Damage due to servicing that isnot authorized by Dell is not covered by your warranty. Read and follow the safety instructionsthat 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.Troubleshooting The NVRAM Backup BatteryCAUTION: Many repairs may only be done by a certified service technician. You should onlyperform troubleshooting and simple repairs as authorized in your product documentation, or asdirected by the online or telephone service and support team. Damage due to servicing that isnot authorized by Dell is not covered by your warranty. Read and follow the safety instructionsthat came with the product.The battery maintains the blade configuration, date, and time information in the NVRAM when the bladeis turned off. You may need to replace the battery if an incorrect time or date is displayed during the bootroutine.You can operate the blade without a battery; however, the blade configuration information maintained bythe 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 youreplace 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 notresolved 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 maylose 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 bladeoperates normally except for the time maintained by the System Setup, the problem may becaused by a software rather than by a defective battery.71