Table 6. IMM error messages (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 4, “Parts listing, System x3550 M3 Types 4254 and 7944,” on page 159 to determine which
components are customer replaceable units (CRU) and which components are field replaceable units
(FRU).
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Sensor Sys Board Fault has transitioned
to critical from a less severe state.
Error A sensor has changed to
Critical state from a less
severe state.
1. Check the
system-event log.
2. Check for an error LED
on the system board.
3. Replace any failing
device.
4. Check for a server
firmware update.
Important: Some
cluster solutions
require specific code
levels or coordinated
code updates. If the
device is part of a
cluster solution, verify
that the latest level of
code is supported for
the cluster solution
before you update the
code.
5. (Trained service
technician only)
Replace the system
board.
The Power Supply (Power Supply: n)
has Failed.
(n = power supply number)
Error Power supply nhas failed.
(n = power supply number)
1. If the power-on LED is
lit, complete the
following steps:
a. Reduce the server
to the minimum
configuration (see
“Power-supply
LEDs” on page
110).
b. Reinstall the
components one at
a time, restarting
the server each
time.
c. If the error recurs,
replace the
component that you
just reinstalled.
2. Reseat power supply
n.
3. Replace power supply
n.
(n = power supply number)
56 IBM System x3550 M3 Types 4254 and 7944: Problem Determination and Service Guide
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