Sun Microsystems 220R manual Power Supply Failure, DIMM Failure

Power Supply Failure

If there is a problem with a power supply, the system fault indicator lights on the front panel. If you have more than one power supply, then you can use the LEDs located on the power supplies themselves to identify the faulty supply. The power supply LEDs will indicate any problem with the AC input or DC output. See “Power Supply LEDs” on page 141 for more information about the LEDs. To replace a power supply, contact a qualified service provider.

DIMM Failure

SunVTS and POST diagnostics can report memory errors encountered during program execution. Memory error messages typically indicate the DIMM location number (“U” number) of the failing module. To replace a DIMM, contact a qualified service provider.

Use the following diagram to identify the location of a failing memory module from its U number:

152 Sun Enterprise 220R Server Owner’s Guide • October 1999