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Monitor problems
Wavy, unreadable, rolling,
distorted screen, or screen
jitter.
The monitor works when you
turn on the system, but goes
blank when you start some
application programs.
Blank screen
Only the cursor appears.
Wrong characters appear on
the screen.
General problems
problems such as indicator
lights not working.
System continuously restarts.
Server does not respond to
the Power On or Reset
button.
Action
Verify that the correct device driver is properly installed.
If the monitor self-tests show that the monitor is OK, 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.
(Moving a color monitor while it is turned on might cause screen
discoloration.) Then, move the device and the monitor at least
305 mm (12 in.) apart. Turn on the monitor.
Notes:
1. The distance between monitors and diskette drives
should be at least 76 mm (3 in.) to prevent diskette
drive read/write errors.
2. Non-IBM monitor cables might cause unpredictable
problems.
3. An enhanced monitor cable with additional shielding
is available for the 9521 and 9527 monitors. See
your IBM reseller or IBM marketing representative for
information on the enhanced monitor cable.
If the problem recurs, have the monitor and system serviced.
Verify that the primary monitor cable is connected to the video
port.
Be sure that you installed the necessary drivers for the
application.
Verify that:
1. The server power cord is plugged into the server and a
working electrical outlet.
2. The monitor power cord is plugged into the monitor and a
working electrical outlet.
3. The monitor is turned on and the Brightness and Contrast
controls are adjusted correctly.
4. The monitor signal cable is connected to the correct
connector on the system.
If the items above are correct and the screen remains blank,
have the system serviced.
Have the system serviced.
Have the system serviced.
Action
Have the system serviced.
Run the diagnostic programs. If the problem recurs, have the
system serviced.
Unattended-start mode might be enabled; enter the user
password to disable unattended-start mode and try again (refer
to the System Security portion of the Configuration/Setup Utility
section of the User's Reference on the IBM xSeries
Documentation CD).
If the server still does not respond, have the system serviced.
Chapter 5. Solving problems
51
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