System Pulse Leds - IBM System x3650 M4 Type 7915 Problem Determination And Service Manual

AC power-supply LEDs
AC DC
Off On
Off On
On Off
On Off
On On

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
RTMM heartbeat
136
IBM System x3650 M4 Type 7915: Problem Determination and Service Guide
Error (!) Description
Off The power supply
has failed.
On The power supply
has failed.
Off Power-supply not
fully seated, faulty
system board, or
the power supply
has failed.
On The power supply
has failed.
On The power supply
has failed.
Description
Power-on and power-off sequencing.
Action
Replace the power supply.
Replace the power supply.
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.
Replace the power supply.
Replace the power supply.
Action
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.
Notes
Typically indicates a
power-supply is not
fully seated.