Lenovo x3250 m6, Installation And Service Manual

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The following table describes the problems that are indicated by various combinations of the power-supply
LEDs and suggested actions to correct the detected problems.
Table 6. Power-supply LEDs
ac
power
LED
dc power
LED
Power-supply
error LED
Description Action
On On Off Normal operation No action needed.
Off Off Off No ac power to the
server or a problem
with the ac power
source.
This symptom is a
normal condition
when no ac power is
present.
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.
On Off Off
Faulty system board
or faulty power
supply
The symptom
typically indicates
that a power supply
is not fully seated.
This is a normal
condition before
turning on the
system.
1. Turn off the server and disconnect the power cord
from the server; then, reconnect the power cord.
2. If the system board error (fault) LED is not lit,
replace the power supply.
3. (Trained technician only) If the system board error
LED is lit, replace the system board.
On Off or
Flashing
On Faulty power supply Replace the power supply.
On On On
Power supply is
faulty but still
operational. Replace the power supply.
System pulse LEDs
This section describes the system pulse LEDs on the system board that monitors the system power-on and
power-off and boot progress.
The following LEDs are on the system board and monitor the system power-on and power-off sequencing
and boot progress. For the location of these LEDs, see “System-board LEDs” on page 24.
CPLD heartbeat LED: If the LED flashes at 1 Hz, it is functioning properly and no action is necessary. If the
LED is not flashing, replace the system board (Trained technician only).
IMM2 heartbeat LED: The LED status shows the following different stages of the IMM2 heartbeat sequencing
process:
1. When this LED is blinking fast (approximately 4 Hz), this indicates that the IMM2 code is in the loading
process.
2. When this LED goes off momentarily, this indicates that the IMM2 code has loaded completely.
3. When this LED goes off momentarily and then starts blinking slowing (approximately 1 Hz), this indicates
that IMM2 is fully operational. You can now press the power-control button to power on the server.
Chapter 5
.
Troubleshooting
55