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 Hardware Maintenance Manual 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 only),” that step must be performed only by a
Trained service technician.
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
in.).
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. Monitor
c. (Trained service technician only) Replace the system board.
Wrong characters appear on the
screen.
1. If the wrong language is displayed, update the UEFI code (see “Using the
Setup Utility” on page 116) 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. Monitor
c. (Trained service technician only) Replace the system board.
152 ThinkServer RD210 Types 3795, 3796, 3818, and 3819: Installation and User Guide
