Lenovo System x3550 M4 Installation And Service Manual page 169

• 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
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.
http://www.lenovo.com/support
Action
the component that you just reinstalled is defective. Replace the defective
component.
• DIMMs 7 through 12 (see "Removing a memory module" on page 216 and
"Installing a memory module" on page 217).
• Hard disk drives
• Fan 2 (see "Removing a hot-swap fan" on page 243 and "Replacing a hot-
swap fan" on page 244).
• Fan 1
• Optional PCI adapter power cable (if one is present)
5. Follow actions in "Solving power problems" on page 159, 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 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 298 and "Replacing the system board" on page 301).
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 216 and
"Installing a memory module" on page 217).
• Hard disk drives
• Fan 4 (see "Removing a hot-swap fan" on page 243 and "Installing a memory
module" on page 217).
• Fan 3
• DVD drive, if one is present (see "Removing a DVD drive" on page 208 and
"Replacing a DVD drive" on page 210).
5. Follow actions in "Solving power problems" on page 159, 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.
to check for technical information, hints, tips,
Chapter 4
. 155
Troubleshooting