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, Type 4364, 4365, or 4366 server,” on page 15 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.
System-event/error log message Action
System under recommended voltage on +2.5v.
1. Reseat the following components:
a. (Trained service technician only) System board
b. Power supply
2. (Trained service technician only) Replace the system board.
System shut off due to system board under
temperature.
1. Make sure that the fans have good airflow and are not
obstructed.
2. (Trained service technician only) Reseat the system board.
3. (Trained service technician only) Replace the system board.
System x started a RS485 connection with us Information only.
We started a RS485 connection with remote
system x
Information only.
We will retry sending alert ID x; when accepted
by a remote system, it will have a different ID
Information only.
Windows blue screen has been captured Information only.
Solving power problems
Power problems can be difficult to solve. For example, a short circuit can exist
anywhere on any of the power distribution buses. Usually, a short circuit will cause
the power subsystem to shut down because of an overcurrent condition. To
diagnose a power problem, use the following general procedure:
1. Turn off the server and disconnect all ac power cords.
2. Check for loose cables in the power subsystem. Also check for short circuits, for
example, if a loose screw is causing a short circuit on a circuit board.
3. Remove the adapters and disconnect the cables and power cords to all internal
and external devices until the server is at the minimum configuration that is
required for the server to start (see “Solving undetermined problems” on page
114 for the minimum configuration).
4. Reconnect all ac power cords and turn on the server. If the server starts
successfully, replace the adapters and devices one at a time until the problem is
isolated.
If the server does not start from the minimum configuration, replace the components
in the minimum configuration one at a time until the problem is isolated.
Solving Ethernet controller problems
The method that you use to test the Ethernet controller depends on which operating
system you are using. See the operating-system documentation for information
about Ethernet controllers, and see the Ethernet controller device-driver readme file.
112 IBM System x3250 Types 4364, 4365, and 4366: Problem Determination and Service Guide
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