IBM System x3650 M4 Type 7915 Problem Determination And Service Guide

AC power-supply LEDs
Description Action NotesAC DC Error (!)
Off On Off The power supply
has failed.
Replace the power supply.
Off On On The power supply
has failed.
Replace the power supply.
On Off Off Power-supply not
fully seated, faulty
system board, or
the power supply
has failed.
1. Reseat the power supply.
2. Follow actions in the “Power
problems” on page 115.
3. If the OVER SPEC LED on
the light path diagnostics is
lit, follow the actions in “Light
path diagnostics” on page
124.
4. If the OVER SPEC LED on
the light path diagnostics is
not lit, check the error LEDs
on the system board and the
IMM2 error messages. Follow
steps in “Power problems” on
page 115 and “Solving power
problems” on page 175 until
the problem is solved.
Typically indicates a
power-supply is not
fully seated.
On Off On The power supply
has failed.
Replace the power supply.
On On On The power supply
has failed.
Replace the power supply.
System pulse LEDs
The following LEDs are on the system board and monitor the system power-on and
power-off sequencing and boot progress (see “System-board LEDs” on page 21 for
the location of these LEDs):
Table 8. System pulse LEDs
LED Description Action
RTMM heartbeat Power-on and power-off sequencing.
1. If the LED blinks at 1Hz, it is
functioning properly and no action
is necessary.
2. If the LED is not blinking, (Trained
technician only) replace the
system board.
136 IBM System x3650 M4 Type 7915: Problem Determination and Service Guide

IBM System x3650 M4 Type 7915 Specifications

General

Brand	IBM
Model	System x3650 M4 Type 7915
Category	Server
Language	English