Lenovo System x3650 M5 Installation And Service Manual page 113

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
technician.
v Go to the support website at http://support.lenovo.com/ to check for technical information, hints, tips, and new
device drivers or to submit a request for information.
Symptom
The Pwr rail A error has been
recorded in the system event
log.
The Pwr rail B error has been
recorded in the system event
log.
The Pwr rail C error has been
recorded in the system event
log.
The Pwr rail D error has been
recorded in the system event
log.
Action
1. Disconnect the server power cords.
2. (Trained technician only) remove microprocessor 1 if the Pwr rail A error has
been recorded in the system event log.
3. (Trained technician only) replace the system board (see "Removing the system
board" on page 288 and "Replacing the system board" on page 291).
4. Reinstall the component; then, restarting the server. If the Pwr rail A error has
been recorded in the system 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 270 and "Replacing a microprocessor and heat sink"
on page 276).
1. Disconnect the server power cords.
2. Remove DIMMs 1 through 12 if Pwr rail B error has been recorded in the
system event log.
3. Restart the server. If the Pwr rail B error has been recorded in the system event
log again, (trained technician only) replace the system board (see "Removing
the system board" on page 288 and "Replacing the system board" on page
291).
4. Reinstall the DIMM one at a time, restarting the server each time. If the Pwr
rail B error has been recorded in the system event log again, the DIMM that
you just reinstalled is defective. Replace the defective component.
1. Disconnect the server power cords.
2. (Trained technician only) remove microprocessor 2 if Pwr rail C error has been
recorded in the system event log.
3. Restart the server. If the Pwr rail C error has been recorded in the system
event log again, (trained technician only) replace the system board (see
"Removing the system board" on page 288 and "Replacing the system board"
on page 291).
4. Reinstall the Processor; then, restarting the server. If the Pwr rail C error has
been recorded in the system event log again, the Processor that you just
reinstalled is defective. Replace the defective component.
(Trained technician only) Microprocessor 2 (see "Removing a
v
microprocessor and heat sink" on page 270 and "Replacing a microprocessor
and heat sink" on page 276).
1. Disconnect the server power cords.
2. Remove DIMMs 13 through 24 if Pwr rail D error has been recorded in the
system event log.
3. Restart the server. If the Pwr rail D error has been recorded in the system
event log again, (trained technician only) replace the system board (see
"Removing the system board" on page 288 and "Replacing the system board"
on page 291).
4. Reinstall the DIMM one at a time, restarting the server each time. If the Pwr
rail B error has been recorded in the system event log again, the DIMM that
you just reinstalled is defective. Replace the defective component.
Chapter 3. Troubleshooting
99