v
Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v
If an action step is preceded by “(Trained technician only),” that step must be performed only by a Trained
service technician.
v
Go to the IBM support website at http://www.ibm.com/supportportal/ to check for technical information,
hints, tips, and new device drivers or to submit a request for information.
Symptom
Action
The OVER SPEC LED on the
light path diagnostics panel is
lit, or the Pwr rail 1 error has
been recorded in the IMM2
event log.
1. Disconnect the server power cords.
2. (Trained technician only) remove microprocessor 1 if the Pwr rail 1 error has
been recorded in the IMM2 event log.
3. (Trained technician only) replace the system-board tray (see “Removing the
system-board tray” on page 335 and “Installing the system-board tray” on page
338).
4. Reinstall the component; then, restarting the server. If the Pwr rail 1 error has
been recorded in the IMM2 event log again, the component that you just
reinstalled is defective. Replace the defective component.
v
(Trained technician only) Microprocessor 1 (see “Removing a microprocessor
and heat sink” on page 325 and “Installing a microprocessor and heat sink”
on page 328).
5. Replace the power supply if the OVER SPEC LED on the light path diagnostics
panel is still lit.
The OVER SPEC LED on the
light path diagnostics panel is
lit, or the Pwr rail 2 error has
been recorded in the IMM2
event log.
1. Disconnect the server power cords.
2. (Trained technician only) remove microprocessor 2 if Pwr rail 2 error has been
recorded in the IMM2 event log.
3. Restart the server. If the Pwr rail 2 error has been recorded in the IMM2 event
log again, (trained technician only) replace the system-board tray (see
“Removing the system-board tray” on page 335 and “Installing the
system-board tray” on page 338).
4. Reinstall the component; then, restarting the server. If the Pwr Rail 2 error has
been recorded in the IMM2 event log again, the component that you just
reinstalled is defective. Replace the defective component.
v
(Trained technician only) Microprocessor 2 (see “Removing a microprocessor
and heat sink” on page 325 and “Installing a microprocessor and heat sink”
on page 328).
5. Replace the power supply if the OVER SPEC LED on the light path diagnostics
panel is still lit.
Chapter 3. Diagnostics
181
Summary of Contents for System x iDataPlex dx360 M4 7912
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