Lenovo System x3850 X6 Installation And Service Manual page 173

Table 33. Problems indicated by power-supply LEDs and the Power-on LED on the front operator panel and the
suggested actions to solve the problems
Power-supply LEDs
AC DC Error
On On
Off Off
Off Off
Off On
Off On
On Off
On Off
On On
Light path diagnostics LEDs description
This topic provides a description of the light path diagnostics LEDs.
The following table describes the server LEDs to help you detect the location of the problems. For the
location of the server LEDs, see "Storage book LEDs" on page 153, "Compute book LEDs" on page 154,
"DIMMs and microprocessor LEDs" on page 155, "Half-length I/O book LEDs" on page 156, "Full-length I/O
book LEDs" on page 157, "Standard I/O book LEDs" on page 157, and "Power-supply LEDs" on page 158.
Note: Check the IMM event log or the system-event log for additional information before you replace a FRU.
See Chapter 5 "Parts listing, System x3850 X6 and x3950 X6 Type 6241" on page 201, to determine which
components are customer replaceable units (CRU) and which components are field replaceable units (FRU).
Description
Off Normal operation
Off No ac power to the
server, a problem with
the ac power source, or
a power supply has
failed.
On No input power to the
power supply or the
power-supply has
detected an internal
problem.
Off The power supply has
failed
On Faulty power-supply
Off The system is off: The
system is connected to
power.
The system is on:
Power-supply not fully
seated, faulty standard
I/O book, or faulty
power-supply.
Faulty power-supply
On
On Power-supply is faulty
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.
Replace the power supply.
1. Reseat the power supply.
2. Replace the power-
supply.
3. Replace the standard I/O
book.
Replace the power supply.
Replace the power supply.
Chapter 4
Notes
The server is
functioning
correctly.
This is a normal
condition when no
ac power is
present.
This happens only
when a second
power supply is
providing power to
the server.
The server is
functioning
correctly.
Typically indicates
a power-supply is
not fully seated.
. 159
Troubleshooting