Lenovo System x3550 M3 Problem Determination And Service Manual page 398

Table 10. Light path diagnostics panel LEDs (continued)
• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See "Parts listing" 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.
Description
LED
The power supplies are using
OVER SPEC
(Continued) more power than their maximum
rating.
System x3550 M3Problem Determination and Service Guide
386
Action
If the 12 V channel C error LED is lit, complete the following
steps:
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), bit 3 to allow the server to power-on. See
"System-board switches and jumpers" on page 18
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.
If the 12 V channel D error LED is lit, complete the following
steps:
1. Turn off the server and disconnect the power from the
server.
2. (Trained service technician only) Remove 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), bit 3 to allow the server to power-on. See
"System-board switches and jumpers" on page 18
location of the SW4 switch block on the system board.
3. Restart the server to see whether the problem remains.
4. (Trained service technician only) Reinstall the
microprocessor in socket 1 and restart the server.
5. Replace any failing device.
6. (Trained service technician only) Replace the system
board.
(Continued on the next page.)
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