• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See
Chapter 4 “Parts listing, Lenovo System x3550 M3 Type 4254 and 7944” on page 403 to determine which
components are customer replaceable units (CRU) and which components are field replaceable units (FRU).
• If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
Trained service technician.
• 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
8. See
“Power-supply LEDs” on page 391 and “Solving undetermined problems”
on page 400
.
The OVER SPEC LED on the
light path diagnostics panel is
lit, and the 12v channel A LED
on the system board is lit.
1. Turn off the server and disconnect the power from the server.
2. Remove the optical drive, fans, hard disk drives, and hard disk drive backplane.
3. Restart the server to see whether the problem remains.
4. Reinstall each device that you removed in step 2 one at a time, starting the
server each time, to isolate the failing device.
5. Replace any failing device.
6. (Trained service technician only) Replace the system board.
The OVER SPEC LED on the
light path diagnostics panel is
lit, and the 12v channel B LED
on the system board is lit.
1. Turn off the server and disconnect the power from the server.
2. Remove the PCI riser card in connector 1, all DIMMs, and the microprocessor in
socket 2.
3. Restart the server to see whether the problem remains.
4. Reinstall each device that you removed in step 2 one at a time, starting the
server each time, to isolate the failing device.
5. Replace any failing device.
6. (Trained service technician only) Replace the system board.
The OVER SPEC LED on the
light path diagnostics panel is
lit, and the 12v channel C LED
on the system board is lit.
1. Turn off the server and disconnect the power from the server.
2. Remove the SAS/SATA RAID riser card, DIMMs in connectors 1 through 9, and
the microprocessor in socket 1.
Note: The server will not power-on when the microprocessor in socket 1 or 2 is
not installed in the server. (Trained service technician only) Toggle the switch
block (SW4), switch 3 to allow the server to power-on. See “System-board
switches and jumpers” on page 18
for the location of the SW4 switch block on
the system board.
3. Restart the server to see whether the problem remains.
4. Reinstall each device that you removed in step 2 one at a time, starting the
server each time, to isolate the failing device.
5. Replace any failing device.
6. (Trained service technician only) Replace the system board.
Chapter 3. Diagnostics 375
To Next Page
Loading...
