IBM System x3650 M3 4255 Service Guide

Microprocessor 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, Types 4255, 7945, and 7949 server,” on page 157 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.
v Go to the IBM support Web site at http://www.ibm.com/systems/support/ to check for technical
information, hints, tips, and new device drivers or to submit a request for information.
Symptom Action
The server goes directly to the
POST Event Viewer when
turned on.
1. Correct any errors that are indicated by the LEDs (see “Light path diagnostics
LEDs” on page 65).
2. Make sure that the server supports all the microprocessors and that the
microprocessors match in speed and cache size. To compare the
microprocessor information, run the Setup utility and select System
Information, then select System Summary , and then Processor Details.
3. (Trained service technician only) Reseat the microprocessors.
4. (Trained service technician only) Remove microprocessor 2 and restart the
server.
5. (Trained service technician only) Replace the following components, in the
order shown, restarting the server each time:
v Microprocessors
v System board
Monitor or video problems
Some IBM monitors have their own self-tests. If you suspect a problem with your
monitor, see the documentation that comes with the monitor for instructions for
testing and adjusting the monitor. If you cannot diagnose the problem, call for
service.
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, Types 4255, 7945, and 7949 server,” on page 157 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.
v Go to the IBM support Web site at http://www.ibm.com/systems/support/ to check for technical
information, hints, tips, and new device drivers or to submit a request for information.
Symptom Action
Testing the monitor.
1. Make sure that the monitor cables are firmly connected.
2. Try using the other video port.
3. Try using a different monitor on the server, or try testing the monitor on a
different server.
4. Run the diagnostic programs (see “Running the diagnostic programs” on page
72). If the monitor passes the diagnostic programs, the problem might be a
video device driver.
5. (Trained service technician only) Replace the system board
Chapter 3. Diagnostics 51

IBM System x3650 M3 4255 Specifications

General

Brand	IBM
Model	System x3650 M3 4255
Category	Server
Language	English