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Chapter 5
Troubleshooting
Troubleshooting System Power
152
is visible from rear of the system by looking through the holes in the sheet metal directly above
the iLO MP LAN connector. The iLO MP heartbeat LED is on the left, closest to the power
supplies. This LED flashes at 1 Hz whenever housekeeping voltages are available and the iLO
MP circuitry is functional. If it is not flashing (or is solid green), the iLO MP circuitry might be
nonfunctional or is not receiving housekeeping voltages.
• The BMC heartbeat LED.
This LED is located immediately to the right (from rear view) of the iLO MP heartbeat LED. It
flashes green at 1 Hz whenever ac power is applied to the system, minimum housekeeping
voltages are available, and the BMC circuitry is functional. If it is not flashing, the BMC
circuitry might be nonfunctional or the internal housekeeping voltages are missing.
• If the iLO MP heartbeat LED is not flashing but the BMC heartbeat is flashing, replace the I/O
baseboard:
• If the BMC heartbeat LED is not flashing but the iLO MP heartbeat is flashing:
— Replace the I/O baseboard.
— Replace the midplane board.
• If neither heartbeat LED is flashing, internal dc housekeeping voltages might be missing.
Housekeeping voltages (12_STBY) are generated by the power supplies and passed through the
dc power distribution board, attached ribbon cable, and midplane board to the I/O baseboard.
— Replace the dc power distribution board.
— Replace the midplane board.
— Replace the flat gray cable between the dc power distribution and midplane.
— Replace the I/O baseboard.
If the iLO MP LAN terminal port responds to a
Ctrl-B prompt, first examine the iLO MP System Logs (SL)
and look at the SEL for any recent alerts that have an alert level of 3 or greater before replacing any
hardware.
To look at the SEL, follow these steps:
Step 1. Select TEXT mode and set the alert level to 3.
Step 2. If there are many entries in the SEL logs and you are not sure which ones are associated with the
current problem, clear the iLO MP logs.
TIP Store the entries somewhere else first and recreate the failure.
Step 3. Look at the SEL logs again.
Step 4. If the SEL logs do not assist in determining the root cause of the problem, go on to “System
Build-Up Troubleshooting” on page 152.
System Build-Up Troubleshooting
To perform the system build-up troubleshooting procedure, follow these steps:
Step 1. Remove all the ac power cords from the power supplies.