Network Connection Problems - Lenovo System x3250 M5 Installation And Service Manual

Table 24. Monitor and video's symptoms and actions (continued)
Symptom
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.
Wrong characters appear on
the screen.

Network connection problems

• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
Action
a. Monitor
b. Video adapter (if one is installed)
c. (Trained technician only) System board
7. See "Solving undetermined problems" on page 141.
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 126).
• If the server passes the video diagnostics, the video is good; see "Solving
undetermined problems" on page 141.
• (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:
a. Monitor
b. (Trained technician only) System board
1. If the wrong language is displayed, update the server firmware to the latest level
(see "Updating the firmware" on page 85) with the correct language.
2. Reseat the monitor and cable.
3. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Monitor
b. (Trained technician only) System board
.
Chapter 4 Troubleshooting
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