Chapter 7. Reference; Troubleshooting Quick Reference; Controller And Interface Problems - IBM F10 Service Manual

Chapter 7. Reference

Troubleshooting Quick Reference

Controller and Interface Problems

Symptom: Controller LED (front) is on.
1. Possible Cause: Controller FRU missing or unplugged.
2. Possible Cause: Controller FRU failed.
3. Possible Cause: Controller backpanel failed.
Symptom: Software issued a controller error message.
1. Possible Cause: Controller FRU failed.
Symptom: Controller and Fan LEDs (front) are on.
1. Possible Cause: Controller fan failure caused one or both controllers to
Symptom: Power LEDs (front and power supply FRUs) are on,
but all other Power LEDs are off.
1. Possible Cause: Other FRUs are missing or not installed correctly.
© Copyright IBM Corp. 1999
a. Check the Power LEDs on both controller FRUs. If both Power LEDs are on,
go to Possible Cause 2. If one Power LED is off, make sure that the FRU is
plugged in correctly and its handles are locked in place.
b. If the Power LED remains off or the Fault LED turns on, go to Possible
Cause 2.
a. Check the Fan LED on the front cover. If it is on, go to "Troubleshooting
Controller Fan Problems" on page 105. If not, continue at the next step.
b. Replace the failed controller FRU using the instructions on "Replacing a
Failed Controller" on page 93.
c. If the Fault LED remains on after replacing the controller, go to Possible
Cause 3.
a. Replace the controller backpanel using the instructions on "Replacing a
Failed Controller Backpanel" on page 98. If the Fault LED remains on after
replacing the backpanel, call your next level of support.
a. Check the Fan LED on the front cover. If it is on, go to "Troubleshooting
Controller Fan Problems" on page 105. If not, continue at the next step.
b. Replace the failed controller FRU using the instructions on "Replacing a
Failed Controller" on page 93.
overheat.
a. Stop all activity to the controller module and turn off the power.
b. Replace the failed controller fan FRU using the instructions on "Replacing a
Failed Controller Fan" on page 106.
c. Allow the controller module to cool down, then turn on the power.
d. Check both controller FRUs for fault LEDs. If a controller Fault LED turns
on, then replace the failed controller FRU using the instructions on
"Replacing a Failed Controller" on page 93.
a. Check all FRUs in the controller module and make sure they are installed
securely. If this does not fix the problem, go to Possible Cause 2.
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