IBM 9228 - IntelliStation Z - Pro Installation Manual page 56

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See the parts listing in the Problem Determination and Service Guide 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)," that step must be performed only by a
trained service technician.
Symptom
The monitor has screen jitters, or the screen image is
wavy, unreadable, rolling, or distorted.
Wrong characters appear on the screen.
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IBM IntelliStation Z Pro Type 9228: Installation Guide
Action
1. If the monitor self-tests show that the monitor is
working properly, consider the location of the monitor.
Magnetic fields around other devices (such as
transformers, appliances, fluorescent lights, 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 al 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-IBM monitor cables might cause
unpredictable problems.
2. Replace the following components one at a time, in
the order shown, restarting the computer each time:
a. Monitor
b. Video adapter (if one is installed)
c. (Trained services technician only) System board
1. If the wrong language is displayed, update the BIOS
code with the correct language.
2. Replace the following components one at a time, in
the order shown, restarting the computer each time:
a. Video adapter (if one is installed)
b. (Trained service technician only) System board