Power problems can be difficult to solve. For example, a short circuit can exist anywhere on any of the power distribution buses. Usually, a short circuit will cause the power subsystem to shut down because of an overcurrent condition.
Complete the following steps to diagnose and resolve a suspected power problem.
- Check for short circuits, for example, if a loose screw causes short circuit on a circuit board.
- Remove the adapters and disconnect the cables and power cords to all internal and external devices until the server is at the minimum configuration that is required for the server to start. The minimum configuration required for the server is as the following:
- One processor and one processor cooling heat sink
- One 16 GB ECC UDIMM in DIMM slot 1
- One power supply
- One power cord
- One 3.5-inch SATA drive in drive bay 0
- One system front fan (if debugging is out of chassis)
- Reconnect all AC power cords and turn on the server. If the server starts successfully, reseat the adapters and devices one at a time until the problem is isolated.
If the server does not start from the minimum configuration, replace the components in the minimum configuration one at a time until the problem is isolated.