System Build-Up Troubleshooting - HP rp4410 Service Manual

4. If a terminal attached to the iLO MP LAN port does not respond to a Ctrl-B CR key
sequence (and the terminal is running at 9600 baud, 8 data bits, No Parity, 1 Stop Bit,
Xon/Xoff, and is online), the iLO MP might be hung or nonfunctional. Check the following
LEDs located inside the system:
• The iLO MP heartbeat LED.
This green LED is located between the 3.3 V and 5 V VRMs on the I/O baseboard
assembly and is visible from the 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 may 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:
1. Select TEXT mode and set the alert level to 3.
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.
3. Look at the SEL logs again.
4. If the SEL logs do not assist in determining the root cause of the problem, go to
Build-Up Troubleshooting" (page

System Build-Up Troubleshooting

To perform the system build-up troubleshooting procedure, follow these steps:
1. Remove all the AC power cords from the power supplies.
132 Troubleshooting
132).
"System