Lenovo 6241, Installation And Service Manual

Page: 173 / 1990

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
Description
Action Notes AC DC Error
On On Off Normal operation The server is
functioning
correctly.
Off Off Off No ac power to the
server, a problem with
the ac power source, or
a power supply has
failed.
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.
This is a normal
condition when no
ac power is
present.
Off Off On No input power to the
power supply or the
power-supply has
detected an internal
problem.
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.
Off On Off The power supply has
failed Replace the power supply.
Off On On Faulty power-supply Replace the power supply.
On Off Off The system is off: The
system is connected to
power. The server is
functioning
correctly.
The system is on:
Power-supply not fully
seated, faulty standard
I/O book, or faulty
power-supply.
1. Reseat the power supply.
2. Replace the power-
supply.
3. Replace the standard I/O
book.
Typically indicates
a power-supply is
not fully seated.
On Off On Faulty power-supply Replace the power supply.
On On On Power-supply is faulty Replace the power supply.
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).
Chapter 4
.
Troubleshooting
159