Troubleshooting Using the Fault Remind Test Circuits

The sever has two internal test circuits, the System Fault Remind Circuit and the DIMM Fault Remind Circuit. The circuits help you locate failed components. Use the System Fault Remind Circuit to locate a failed CPU or memory riser card, and use the DIMM Fault Remind Circuit to locate a failed DIMM. Both circuits hold an electrical charge and have limited operational capabilities once power is removed from the server. The DIMM Fault Remind Circuit is active for 10 minutes, and the System Fault Remind Circuit is active for 30 to 60 minutes.

Once AC power is connected to the system (providing standby power), the System Fault Remind circuit energy storage capacitor takes about 10 minutes to charge to 63% (which should be sufficient to turn on the indicator) and about 20 minutes to be fully charged. When you push down on the Fault Remind button, its power indicator should show green when the circuit has enough power to identify faulted components.

For information about how to use the circuits to identify failed components, see Locate a Failed Memory Riser Card, DIMM, or CPU.