IBM Netfinity 3500 M10, User Handbook Manual

Page: 201 / 268

Monitor problems Action
Wavy, unreadable,
rolling, distorted, or
jittery screen images. If the monitor self-tests show that the monitor is working properly,
verify that:
1. The location of the monitor is appropriate. Magnetic fields
around other devices, such as transformers, appliances,
fluorescent lights, and other monitors might be causing the
problem. To determine if the location is causing the problem:
a. Turn off the monitor. (Moving a color monitor while it is
turned on might cause screen discoloration.)
b. Adjust the placement of the monitor and other devices so that
they are at least 305 mm (12 in.) apart. Also, when relocating
the monitor, be sure it is at least 75 mm (3 in.) from the
diskette drives to prevent diskette drive read/write errors.
c. Turn on the monitor.
2. An IBM monitor signal cable is properly connected to the monitor
and server, and that the cable is installed securely. Non-IBM
monitor signal cables might cause unpredictable problems.
3. You are not trying to run your monitor at a higher refresh rate
than the monitor supports. Refer to the documentation that
comes with your monitor for supported refresh rates.
Note: An enhanced monitor signal cable with additional shielding
might be available for your monitor. See your IBM reseller or
marketing representative for information.
If the problem cannot be isolated and corrected, have the monitor and
computer serviced.
Screen flickers. Set the monitor for the highest, noninterlaced refresh rate supported
by your monitor and the video controller in your server. For further
information, refer to the documentation that comes with your
monitor.
Attention: Using a resolution or refresh rate that is not supported by
your monitor might damage it.
You can reset the refresh rate through your operating system, using
the instructions provided in the README files. Refer to your
operating system documentation for further information on monitor
settings.
If this does not correct the problem, have the monitor and computer
serviced.
Chapter 6. Solving problems
183