IBM 79463AU Installation And User Manual page 37

Table 2. Light path diagnostics panel LEDs (continued)
v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 3, "Parts listing", in the Problem Determination and Service Guide to determine which
components are customer replaceable units (CRU) and which components are field replaceable units
(FRU).
v If a action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
LED Description
OVER SPEC The power supplies are using
(Continued) more power than their maximum
rating.
LOG An error occurred.
Action
If the 12 V channel E error LED is lit, complete the following
steps:
1. Turn off the server and disconnect the power from the
server.
2. Remove the PCI riser card from PCI riser connector 2 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.
If the 12 V AUX channel error LED is lit, complete the
following steps:
1. Turn off the server and disconnect the power from the
server.
2. Remove all PCI Express and PCI-X cards, all PCI riser
cards, the operator information panel, and the Ethernet
adapter (if installed).
Note: The server will not power-on when the
microprocessor in socket 1 is not installed in the server.
Do the following, depending on the level of your system
board:
v For the pass 8 level system board, (trained service
technician only) toggle the switch block (SW4), bit 6 to
allow the server to power-on. See Table 5 on page 40
for the location of the SW4 switch block on the pass 8
level system board.
v For the pass 9 level system board, (trained service
technician only) toggle the switch block (SW4), bit 2 to
allow the server to power-on. See Table 8 on page 43
for the location of the SW4 switch block on the pass 9
level system board.
3. Restart the server to see whether the problem remains.
4. Reinstall each device that was 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.
Check the IMM system event log and the system-error log for
information about the error. Replace any components that are
identified in the error logs.
Chapter 1. The System x3550 M2 server
21