Lenovo System x3650 M5 Installation And Service Manual page 107

• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• If an action step is preceded by "(Trained technician only)," that step must be performed only by a trained
technician.
• Go to the support website at http://www.lenovo.com/support to check for technical information, hints, tips,
and new device drivers or to submit a request for information.
Symptom
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.
The Pwr rail E error has been
recorded in the system event
log.
Action
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 292 and "Replacing the system board" on page 294).
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 292 and "Replacing the system board" on page 294).
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 microprocessor
and heat sink" on page 276 and "Replacing a microprocessor and heat sink"
on page 281).
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 292 and "Replacing the system board" on page 294).
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. Remove the following components if the Pwr rail E error has been recorded in
the system event log:
• Optional DVD drive (if one is installed)
• Hard disk drives at backplane assembly 1 and/or backplane assembly 2
• Hard disk drive backplane assembly 1 and/or backplane assembly 2
• LCD monitor connected to front VGA port (if one is present)
• Optional adapter (if one is present) installed in riser-card assembly 2
• Riser-card assembly 2
3. Restart the server. If the Pwr rail E error has been recorded in the system event
log again, (trained technician only) replace the system board (see "Removing the
system board" on page 292 and "Replacing the system board" on page 294).
.
Chapter 3 Troubleshooting
95