Lenovo System x3550 M4 Installation And Service Manual page 170

• 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 6 error has
been recorded in the IMM
event log.
The server does not turn off.
156
Lenovo System x3550 M4 Installation and Service Guide
http://www.lenovo.com/support
Action
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 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 6 error has been recorded in the IMM event log again,
the component that you just reinstalled is defective. Replace the defective
component.
• DIMMs 19 through 24 (see "Removing a memory module" on page 216 and
"Installing a memory module" on page 217).
• Fan 6 (see "Removing a hot-swap fan" on page 243 and "Replacing a hot-
swap fan" on page 244).
• Fan 5
• Dual-port network adapter, if one is present (see "Removing the dual-port
network adapter" on page 238 and "Replacing the dual-port network
adapter" on page 240).
• PCI riser-card assembly 2 (see "Removing a PCI riser-card assembly" on
page 223 and "Replacing a PCI riser-card assembly" on page 224).
• Optional adapter (if one is present) installed in PCI riser-card assembly 2 (see
"Removing an adapter" on page 227 and "Replacing an adapter" on page
228).
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. Determine whether you are using an Advanced Configuration and Power
Interface (ACPI) or a non-ACPI operating system. If you are using a non-ACPI
operating system, complete the following steps:
a. Press Ctrl+Alt+Delete.
b. Turn off the server by pressing the power-control button and hold it down for
5 seconds.
c. Restart the server.
to check for technical information, hints, tips,