IBM 7383, Инструкция по установке и обслуживанию

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Table 12. Power-supply LEDs (continued)
AC Power-supply LEDs
Description Action Notes AC DC Error
Off On Off Faulty power
supply Replace the power supply.
Off On On Faulty power
supply Replace the power supply.
On Off Off Power supply
not fully seated,
faulty system
board, or faulty
power supply
1. Reseat the power supply.
2.
If the system board error LED is not
lit, replace the power supply.
3. (Trained technician only) If the system
board error LED is lit, replace the
system board.
Typically indicates
that a power supply
is not fully seated.
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 (see “System-board LEDs and
controls” on page 31 for the location of these LEDs).
Table 13. 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.
IMM2 heartbeat IMM2 heartbeat boot process. The following steps describe the different
stages of the IMM2 heartbeat sequencing
process.
1. When this LED is blinking fast
(approximately 4Hz), 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
1Hz), this indicates that IMM2 is fully
operational. You can now press the
power-control button to power-on the
server.
4. If this LED does not blink within 30
seconds of connecting a power source to
the server, (trained technician only) replace
the system board.
Chapter 4. Troubleshooting
143