Table 17. Power problems and actions (continued)
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 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
Pwr rail 4 error has been
recorded in the system event
log.
1. Disconnect the server power cords.
2. Remove the following components if the Pwr rail 4 error has been recorded in
the system event log:
v Fan 5
v Fan 6
v DIMMs 13 through 24
3. Restart the server. If the Pwr rail 4 error has been recorded in the system event
log again, (trained technician only) replace the system board (see “Removing
the system board” on page 260 and “Replacing the system board” on page
263).
4. Reinstall the components one at a time, in the order shown, restarting the
server each time. If the Pwr Rail 4 error has been recorded in the system event
log again, the component that you just reinstalled is defective. Replace the
defective component.
v DIMMs 13 through 24 (see “Removing a memory module” on page 164 and
“Memory module installation” on page 165).
v Fan 5 (see “Removing a thermal kit (hot-swap fan)” on page 194 and
“Replacing a thermal kit (hot-swap fan)” on page 195).
v Fan 6
Pwr rail 5 error has been
recorded in the system event
log.
1. Disconnect the server power cords.
2. Remove the following components if the Pwr rail 5 error has been recorded in
the system event log:
v Fan 7
v Fan 8
v SAS/SATA hard disk drives and USB
3. Restart the server. If the Pwr rail 5 error has been recorded in the system event
log again, (trained technician only) replace the system board (see “Removing
the system board” on page 260 and “Replacing the system board” on page
263).
4. Reinstall the components one at a time, in the order shown, restarting the
server each time. If the Pwr Rail 5 error has been recorded in the system event
log again, the component that you just reinstalled is defective. Replace the
defective component.
v Hard disk drives and USB
v Fan 7 (see “Removing a thermal kit (hot-swap fan)” on page 194 and
“Memory module installation” on page 165).
v Fan 8
96 IBM System x3550 M5 Type 5463: Installation and Service Guide
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