IBM 8500R - Netfinity - 8681, Hardware Maintenance Manual

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Power control card LED
The power control card LED is located in the center of the
system, between the processors and the midplane. On the
power control card is an LED that provides status of the
card based on its flash rate. To view the LED, look
through the hole in the left side of the chassis.
With AC power applied to the power supplies, the following
conditions may be indicated by the power control card
LED:
1. Slow flash rate (approximately 1 flash per second) -
the power control card is functioning properly.
2. No flashing LED - Power control card is not
operational. Replace the power control card.
3. Fast flash rate (approximately 2 flashes per second) -
the system has a 240VA fault, which will shut down
the system, indicating a possible processor failure or
a short in a system component.
If a 240VA fault is indicated (LED flashing rapidly), do the
following:
1. Leave the AC power applied.
2. Connect to the service processor and view the
system error log, looking for a power failure message
on one or more of the power planes. If a power failure
message is posted, refer to the following table and
proceed as indicated.
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