Power-Supply Leds - IBM x3950 Problem Determination And Service Manual

Power-supply LEDs

The following minimum configuration is required for the DC LED on the power
supply to be lit:
v Power supply
v Power backplane
v Power cord
v Microprocessor tray
The following minimum configuration is required for the server to start:
v One microprocessor
v Two 1 GB DIMMs on the memory card
v One power supply
v Power backplane
v Power cord
v I/O board
v PCI-X board assembly
The following illustration shows the locations of the power-supply LEDs.
The following table describes the problems that are indicated by various
combinations of the power-supply LEDs and the power-on LED on the operator
information panel and suggested actions to correct the detected problems.
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IBM System x3950 Type 8878 and System x3950 E Type 8879: Problem Determination and Service Guide
Power supply 1 (PS1)
AC power
LED (green)
AC
DC power
LED (green)
DC