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• Unit identifier blue/white LED
• A green BMC heartbeat LED
If the system motherboard is powered on and there is no LED activity showing on the unit, it must be
replaced.
Figure 19: System motherboard status LED locations and functions
on page 52 shows
the locations of the motherboard LEDs.
1.
12V overcurrent
2.
Unit ID
3.
BMC heartbeat
4.
Top to bottom: Sleep A state, Platform Reset, Power Good HARP 0, Power Good HARP 1
5.
Top to bottom: Power Good P12V Aux, Power Good P12V E, Power Supply Power OK, System Power OK
6.
Top to bottom: Power Good P3V3 Aux, Power Good P3V3, Power Good P5V Aux, Power Good P5V
7.
Top to bottom: Power Good CPU 0, Power Good CPU 1, Power Good CPU 2, Power Good CPU 3
8.
Top to bottom: Power Good P12V A, Power Good P12V B, Power Good P12V C, Power Good P12V D
Figure 19: System motherboard status LED locations and functions
52
Integrity MC990 X system Troubleshooting