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If an error occurs, view the server LEDs in the following order:
1. Check the front-panel assembly on the front of the server. If the system-error
LED is lit, it indicates that an error has occurred.
2. Check the front and rear of the server to determine whether any component
LEDs are lit.
3. Remove the server cover and look inside the server for lit LEDs. Certain
components inside the server have LEDs that will be lit to indicate the location
of a problem. For example, a DIMM error will light the LED next to the failing
DIMM on the system board.
Look at the system service label on the top of the server, which gives an
overview of internal components. This information can often provide enough
information to correct the error.
Power supply LEDs
The following minimum configuration is required for the server to start:
v One microprocessor
v One 512 MB DIMM
v One power supply
v Power backplane
v Power cord
v System board
The following is an illustration of the connectors, AC power supply LED 1, and DC
power supply LED 2 on the rear of the hot-swap and non-hot-swap server
models.
Chapter 5. Diagnostics 161