Lenovo TD200 - ThinkServer - 3809 Hardware Maintenance Manual page 69

• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See Chapter 8 "Parts listing, TD200 Machine Types 3724, 3808, 3809, 3815, 3817, 3824, 3826, 3836" on page
257 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.
Symptom
The monitor has screen
jitter, or the screen image is
wavy, unreadable, rolling, or
distorted.
Wrong characters appear on
the screen.
Action
1. If the monitor self-tests show the monitor is working correctly, 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 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 following components:
a. Monitor cable
3. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Monitor
b. (Trained service technician only) System board
1. If the wrong language is displayed, update the server firmware with the correct
language (see "Updating the firmware" on page 306).
2. Reseat the monitor cable.
3. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Monitor
b. (Trained service technician only) System board
61
.
Chapter 5 Diagnostics