System Pulse Leds - IBM x3250 M3 Problem Determination And Service Manual

Table 4. Power-supply LEDs
Power-supply LEDs
AC DC Error
Off Off Off
On Off Off
On Off or On
Flashing
On On Off
On On On

System pulse LEDs

The following LEDs are on the system board and indicates the system power-on
and power-off sequencing and boot progress (see "System-board LEDs" on page
18 for the location of these LEDs).
Table 5. System pulse LEDs
LED
H8 heartbeat
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IBM System x3250 M3 Types 4251, 4252, and 4261: Problem Determination and Service Guide
Description Action
No ac power to
1. Check the ac power to the server.
the server or a
2. Make sure that the power cord is
problem with the
connected to a functioning power
ac power source
source.
3. Turn the server off and then turn the
server back on.
4. If the problem remains, replace the
power supply.
Faulty system
1. Turn off the server and disconnect the
board or faulty
power cord from the server; then,
power supply
reconnect the power cord.
2. If the system board error (fault) LED is
not lit, replace the power supply.
3. If the system board error (fault) LED is
lit, (Trained service technician only)
replace the system board.
Faulty power Replace the power supply.
supply
Normal operation
Power supply is Replace the power supply.
faulty but still
operational
Description
power-on and power-off sequencing.
Notes
This is a normal
condition when no
ac power is present.
Typically indicates
that a power supply
is not fully seated.
This is a normal
condition before
turning on the
system.
Action
1. If the LED flashes at 1Hz, it is
functioning properly and no action
is necessary.
2. If the LED is not flashing, (trained
service technician only) replace
the system board.