Lenovo System x3500 M5 Type 5464 Installation And Service Manual page 167

• Go to the IBM support website at http://www.lenovo.com/support to check for technical information,
hints, tips, and new device drivers or to submit a request for information.
Table 25. Monitor and video's symptoms and actions
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.
The monitor has screen
jitter, or the screen image is
wavy, unreadable, rolling, or
distorted.
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 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. Make sure that:
• The server is turned on. If there is no power to the server, see "Power
problems" on page 153.
• The monitor cables are connected correctly.
• The monitor is turned on and the brightness and contrast controls are
adjusted correctly.
• No POST errors are generated when the server is turned on.
3. Make sure that the correct server is controlling the monitor, if applicable.
4. See "Solving undetermined problems" on page 158.
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 "Running DSA Preboot diagnostic programs" on
page 143).
• If the server passes the video diagnostics, the video is good; see "Solving
undetermined problems" on page 158.
• (Trained technician only) If the server fails the video diagnostics, replace
the system board.
1. If the monitor self-tests show that the monitor is working correctly, consider
the location of the monitor. Magnetic fields around other devices (such as
transformers, appliances, fluorescents, and other monitors) can cause screen
jitter or wavy, unreadable, rolling, or distorted screen images. If this happens,
turn off the monitor.
Attention: Moving a color monitor while it is turned on might cause screen
discoloration.
Move the device and the monitor at least 305 mm (12 in.) apart, and turn on
the monitor.
Notes:
a. To prevent diskette drive read/write errors, make sure that the distance
between the monitor and any external diskette drive is at least 76 mm (3 in.).
b. Non-Lenovo monitor cables might cause unpredictable problems.
2. Reseat the monitor and cable.
3. Replace the following components one at a time, in the order shown, restarting
the server each time:
.
Chapter 4 Troubleshooting
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