IBM 7378, Problem Determination And Service Manual

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Intermittent problems
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 x3400 M3 Types 7378 and 7379,” on page 141 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.
Symptom Action
A problem occurs only
occasionally and is difficult to
diagnose.
1. Make sure that:
v
All cables and cords are connected securely to the rear of the server and
attached devices.
v
When the server is turned on, air is flowing from the fan grille. If there is no
airflow, the fan is not working. This can cause the server to overheat and
shut down.
2. Check the system-event log or IMM log (see “Event logs” on page 23).
3. See “Solving undetermined problems” on page 138.
Keyboard, mouse, or pointing-device problems
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 x3400 M3 Types 7378 and 7379,” on page 141 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.
Symptom Action
All or some keys on the
keyboard do not work.
1. Make sure that:
v
The keyboard cable is securely connected.
v
The server and the monitor are turned on.
2. See http://www.ibm.com/servers/eserver/serverproven/compat/us/ for keyboard
compatibility.
3. If you are using a USB keyboard, run the Setup utility and enable keyboardless
operation to prevent the 301 POST error message from being displayed during
startup.
4. If you are using a USB keyboard and it is connected to a USB hub, disconnect
the keyboard from the hub and connect it directly to the server.
5. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Keyboard
b. (Trained service technician only) System board
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IBM System x3400 M3 Types 7378 and 7379: Problem Determination and Service Guide