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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
service 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
The OVER SPEC LED on the
light path diagnostics panel is
lit, or the Pwr rail 3 error has
been recorded in the IMM2
event log.
182
System x iDataPlex dx360 M4 Types 7912 and 7913: Problem Determination and Service Guide
Action
1. Disconnect the server power cords.
2. Remove the following components if Pwr rail 3 error has been recorded in the
IMM2 event log:
v Optional adapter (if one is present) installed in PCI riser-card assembly 1
v PCI riser-card assembly 1
v ServeRAID SAS/SATA adapter (if one is present)
v DIMMs 1 through 4
3. Restart the server. If the Pwr rail 3 error has been recorded in the IMM2 event
log again, (trained service technician only) replace the system-board tray (see
"Removing the system-board tray" on page 335 and "Installing the
system-board tray" on page 338).
4. Reinstall the components one at a time, in the order shown, restarting the
server each time. If the Pwr rail 3 error has been recorded in the IMM2 event
log again, the component that you just reinstalled is defective. Replace the
defective component.
v DIMMs 1 through 4 (see "Removing a memory module" on page 309 and
"Installing a memory module" on page 310).
v ServeRAID SAS/SATA adapter (see "Removing a PCIe adapter from a PCI
riser-card assembly" on page 304 and "Installing an adapter" on page 305).
v PCI riser-card assembly 1 (see "Removing a PCIe riser-card assembly from
the system-board tray" on page 302 and "Installing a PCI riser-card
assembly on the system-board tray" on page 303).
v Optional adapter (if one is present) installed in PCI riser-card assembly 1
(see "Removing a PCIe adapter from a PCI riser-card assembly" on page
304 and "Installing an adapter" on page 305).
5. Follow actions in "Solving power problems" on page 256, 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.
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