7.
If you are running an application program, see if you need
to set up the program for the type of monitor and display
adapter you have. Also make sure you are using the
appropriate monitor
and
display adapter for your software.
Note
If your application program requires a monitor that
supports graphics but you have a monochrome monitor,
the results
will be unpredictable.
8.
If you installed a non-EGA or non-VGA display adapter
card in your computer, and you want to use that adapter as
your primary display adapter, you need to change the setting
of jumper J6 on the main system board to disable the built-
in VGA adapter. If you have not set the jumper, you will
not see any display on the screen.
If you are using one or more MDA, Hercules, or CGA
display adapter cards, you may need to change the setting of
jumper J4 inside your computer. This jumper tells the
computer whether you are using a color or monochrome
monitor. (Jumper J4 is set to the color monitor position at
the factory.) If the jumper is set incorrectly, you will see one
of the following messages:
401
CRT ERROR
501
CRT ERROR
If you are using two different types of video cards, set jumper
J4 to the primary monitor type. You may also need to
change this jumper later if you change the type of monitor
you are using. See “Changing the Jumper Settings” in
Chapter 5 for instructions.
Troubleshooting
D-15
