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 33
for the location of these LEDs).
Table 5. System pulse LEDs
LED Description Action
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.
PCI riser-card LEDs
The following illustration shows the location of the PCI riser-card LEDs.
Upper PCI slot error LED
Center PCI slot error LED
Lower PCI slot error LED
Figure 44. PCI riser-card LEDs
80 System x3650 M5 Type 5462: Installation and Service Guide
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