IBM eServer 342 xSeries, Руководство пользователя

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Chapter 6. Solving problems
103
Power-supply LEDs
The ac and dc power LEDs on the power supply provide status information about the
power supply.
The following table describes the ac and dc power LEDs.
Light Path Diagnostics
You can use the Light Path Diagnostics feature built into your server to quickly identify
the type of system error that occurred. Your server is designed so that any LEDs that
are illuminated remain illuminated when the server shuts down as long as the ac
power source is good and the power supplies can 5 V dc current to the
server. This feature helps you isolate the problem, if an error causes the server to
shut down.
AC power
LED
DC power
LED
Description and action
On On The power supply is on and operating correctly.
On Off There is a dc power problem.
Possible causes:
1. The power-control button on the front of the server is in the
Off position.
Action: Press the power-control button to start the server.
2. The power supply has failed.
Action: Replace the power supply.
If the problem persists, have the system serviced.
Off Off There is an ac power problem.
Possible causes:
1. There is no ac power to the power supply.
Action: Verify that:
• The power cord is properly connected to the server.
• The power outlet functions properly.
2. The power supply has failed.
Action: Replace the power supply.
If the problem persists, have the system serviced.
Table 15. Power supply LEDs.