Lenovo System x3550 M4 Installation And Service Manual page 166

• 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 OVER SPEC LED on the
light path diagnostics panel
is lit, or the Pwr rail 5 error
has been recorded in the IMM
event log.
The OVER SPEC LED on the
light path diagnostics panel
is lit, or the Pwr rail 6 error
has been recorded in the IMM
event log.
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System x3550 M4 Installation and Service Guide
Action
1. Disconnect the server power cords.
2. Remove the following components if the Pwr rail 5 error has been recorded
in the IMM event log:
• DVD drive (if one is installed)
• Fan 3
• Fan 4
• Hard disk drives
• DIMMs 13 through 18
3. Restart the server. If the Pwr rail 5 error has been recorded in the IMM event log
again, (trained technician only) replace the system board (see "Removing the
system board" on page 300 and "Replacing the system board" on page 304).
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 IMM event
log again, the component that you just reinstalled is defective. Replace the
defective component.
• DIMMs 13 through 18 (see "Removing a memory module" on page 213 and
"Installing a memory module" on page 45).
• Hard disk drives
• Fan 4 (see "Removing a hot-swap fan" on page 243 and "Installing a memory
module" on page 45).
• Fan 3
• DVD drive, if one is present (see "Removing a DVD drive" on page 204 and
"Replacing a DVD drive" on page 206).
5. Follow actions in "Solving power problems" on page 156, if the OVER SPEC
LED on the light path diagnostics panel is still lit.
6. Replace the power supply if the OVER SPEC LED on the light path diagnostics
panel is still lit.
1. Disconnect the server power cords.
2. Remove the following components if the Pwr rail 6 error has been recorded
in the IMM event log:
• Optional adapter (if one is present) installed in PCI riser-card assembly 2
• PCI riser-card assembly 2
• Dual-port network adapter (if one is present)
• Fan 5
• Fan 6
• DIMMs 19 through 24
3. Restart the server. If the Pwr rail 6 error has been recorded in the IMM event
log again, (trained technician only) replace the system board (see "Removing the
system board" on page 300 and "Replacing the system board" on page 304).
4. Reinstall the components one at a time, in the order shown, restarting the
server each time. If the Pwr Rail 6 error has been recorded in the IMM event