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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
Testing the monitor.
The screen is blank.
The monitor works when you
turn on the server, but the
screen goes blank when you
start some application
programs.
http://www.ibm.com/supportportal/
Action
1. Make sure that the monitor cables are firmly connected.
2. Try using a different monitor on the server, or try using the monitor that is being
tested on a different server.
3. Run the diagnostic programs. If the monitor passes the diagnostic programs,
the problem might be a video device driver.
4. (Trained service technician only) Replace the system board.
1. If the server is attached to a KVM switch, bypass the KVM switch to eliminate it
as a possible cause of the problem: connect the monitor cable directly to the
correct connector on the rear of the server.
2. The IMM remote presence function is disabled if you install an optional video
adapter. To use the IMM remote presence function, remove the optional video
adapter.
3. Make sure that:
• The server is turned on. If there is no power to the server, see
problems" on page
• The monitor cables are connected correctly.
• The monitor is turned on and the brightness and contrast controls are
adjusted correctly.
4. Make sure that the correct server is controlling the monitor, if applicable.
5. Make sure that damaged server firmware is not affecting the video; see
"Updating the firmware" on page
6. Observe the checkpoint LEDs on the system board; if the codes are changing,
go to step 6.
7. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Monitor
b. Video adapter (if one is installed)
c. (Trained service technician only) System board.
8. See
"Solving undetermined problems" on page
1. Make sure that:
• The application program is not setting a display mode that is higher than the
capability of the monitor.
• You installed the necessary device drivers for the application.
2. Run video diagnostics (see
• If the server passes the video diagnostics, the video is good; see
undetermined problems" on page
• (Trained service technician only) If the server fails the video diagnostics,
replace the system board.
to check for technical information, hints,
373.
513.
400.
"Running the diagnostic programs" on page
400.
to determine which
"Power
318).
"Solving
.
Chapter 3
Diagnostics
371
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