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• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
Chapter 4 "Parts listing, Lenovo System x3550 M3 Type 4254 and 7944" on page 403
• See
components are customer replaceable units (CRU) and which components are field replaceable units (FRU).
• If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
Trained service technician.
• Go to the IBM support website at
tips, and new device drivers or to submit a request for information.
Symptom
A problem occurs only
occasionally and is difficult to
diagnose.
The server resets (restarts)
occasionally.
Keyboard, mouse, or pointing-device problems
Use this information to solve keyboard, mouse, or pointing-device problems.
System x3550 M3Problem Determination and Service Guide
366
http://www.ibm.com/supportportal/
Action
1. Make sure that:
• All cables and cords are connected securely to the rear of the server and
attached devices.
• 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
26).
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 Setup utility 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
page 305
and
"Diagnostic messages" on page
2. If the reset occurs after the operating system starts, disable any automatic
server restart (ASR) utilities, such as the IBM Automatic Server Restart IPMI
Application for Windows, or any ASR devices that are 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
page
379.
3. If neither condition applies, check the system-error log or IMM system-event log
(see
"Event logs" on page
to check for technical information, hints,
319.
26).
to determine which
"Event logs" on page
"POST error codes" on
"Software problems" on
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