Intermittent Problems; Usb Keyboard, Mouse, Or Pointing-Device Problems - IBM x3250 M2 Problem Determination And Service Manual

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 3, "Parts listing, Types 4190, 4191 and 4194 server," on page 31 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
A problem occurs only
occasionally and is difficult to
diagnose.

USB 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 3, "Parts listing, Types 4190, 4191 and 4194 server," on page 31 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
All or some keys on the
keyboard do not work.
Action
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/error log or BMC system-event log (see "Error logs" on
page 102).
3. See "Solving undetermined problems" on page 199.
Action
1. See http://www.ibm.com/servers/eserver/serverproven/compat/us/ for keyboard
compatibility.
2. Make sure that:
v The keyboard cable is securely connected.
v The server and the monitor are turned on.
3. Move the keyboard cable to a different USB connector.
4. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Keyboard
b. (Only if the problem occurred with a front USB connector) Internal cables to
the operation information panel
c. (Only if the problem occurred with a front USB connector) Operator
information panel
d. (Trained service technician only) System board
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Chapter 5. Diagnostics