Intermittent Problems; Keyboard, Mouse, Or Pointing-Device Problems - Lenovo 653417U Installation And User 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 the Hardware Maintenance Manual to determine which components are customer replaceable units (CRUs)
and which components are field replaceable units (FRUs).
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.
The server resets (restarts)
occasionally.

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 the Hardware Maintenance Manual to determine which components are customer replaceable units (CRUs)
and which components are field replaceable units (FRUs).
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-error log or IMM system event log (see "POST" on page
113).
1. If the reset occurs during POST and the POST watchdog timer is enabled (click
System Settings --> Integrated Management Module --> POST Watchdog
Timer in the UEFI Setup Utility program to see the POST watchdog setting),
make sure that sufficient time is allowed in the watchdog timeout value
(POST Watchdog Timer). If the server continues to reset during POST, see
"POST" on page 113.
2. If the reset occurs after the operating system starts, disable any automatic
server restart (ASR) utilities or ASR devices that may be installed.
Note: ASR utilities operate as operating-system utilities and are related to the
IPMI device driver. If the reset continues to occur after the operating system
starts, the operating system might have a problem; see "Software problems" on
page 135.
3. If neither condition applies, check the system-error log or IMM system event
log (see "POST" on page 113).
If the problem remains, call for service.
Action
1. Make sure that the keyboard cable is securely connected.
2. 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.
3. 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
Chapter 8. Solving problems
127