IBM 7383, Installation And Service Manual

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Power-supply LEDs
This section describes the power-supply LEDs on the rear of the server and the
suggested actions to correct the detected problems.
The following illustration shows the power-supply LEDs on the rear of the server.
The following table describes the problems that are indicated by various
combinations of the power-supply LEDs and the system power LED on the
operator information panel and suggested actions to correct the detected problems.
Table 12. Power-supply LEDs
AC Power-supply LEDs
Description Action Notes AC DC Error
On On Off Normal
operation
Off Off Off No ac power to
the server or a
problem with the
ac power source.
1. Check the ac power to the server.
2. Make sure that the power cord is
connected to a functioning power
source.
3. Restart the server. If the error remains,
check the power‐supply
LEDs.
4. If the problem remains, replace the
power‐supply.
This is a normal
condition when no
ac power is present.
Off Off On Faulty
power
‐supply.
1. Make sure that the power cord is
connected to a functioning power
source.
2. Replace the power supply.
This happens only
when a second
power supply is
providing power to
the server.
Figure 31. Power-supply LEDs on the rear of the server
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System x3500 M4 Type 7383: Installation and Service Guide