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• Two processors installed
• At least one 2.5-inch drive installed
• One power supply
• Power cord
The following table describes the problems that are indicated by various combinations of the power-supply
LEDs and the power-on LED on the front operator panel and suggested actions to correct the detected
problems.
Power supply LEDs
DC
AC
On
On
Off
Off
Off
Off
Off
On
Blinking
On
Off
On
On
Off
ThinkSystem SR850 Maintenance Manual
152
Error
Description
Normal operation
Off
No ac power to the server, a
problem with the ac power
source, or a power supply
has failed.
Off
No input power to the power
supply or the power-supply
has detected an internal
On
problem.
The power supply has failed.
Off
The power supply is in zero
output mode (standby).
When the total power
consumption is low, only
Off
one of the power supplies
delivers the entire power,
while the other is put into
this mode.
Faulty power supply.
On
The system is off: The
system is connected to
Off
power.
Action
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. Replace the power-
supply.
1. Make sure that the power
cord is connected to a
functioning power
source.
2. Replace the power
supply.
Replace the power supply.
Zero output advanced mode
is on by default, and the
standby power supply unit will
function normally when power
consumption increases. To
disable zero output mode,
choose System Settings ->
Power -> Zero Output ->
Disable.
Replace the power supply.
Note
The server is
functioning
correctly.
This happens
only when a
second power
supply is
providing power
to the server
The server is
functioning
correctly.
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