• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See
Chapter 4 “Parts listing, Lenovo System x3550 M3 Type 4254 and 7944” on page 403 to determine which
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
http://www.ibm.com/supportportal/ to check for technical information, hints,
tips, and new device drivers or to submit a request for information.
Symptom
Action
The monitor has screen jitter,
or the screen image is wavy,
unreadable, rolling, or
distorted.
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
inch).
b. Non-IBM monitor cables might cause unpredictable problems.
2. Reseat the monitor cable.
3. Replace the components listed in step 2 one at a time, in the order shown,
restarting the server each time:
a. Monitor cable
b. Video adapter (if one is installed)
c. Monitor
d. (Trained service technician only) System board.
Wrong characters appear on
the screen.
1. If the wrong language is displayed, update the server firmware to the latest level
(see
“Updating the firmware” on page 513) with the correct language.
2. Reseat the monitor cable.
3. Replace the components listed in step 2 one at a time, in the order shown,
restarting the server each time:
a. Monitor cable
b. Video adapter (if one is installed)
c. Monitor
d. (Trained service technician only) System board.
Optional-device problems
Use this information to solve optional-device problems.
372
System x3550 M3Problem Determination and Service Guide
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