I recently acquired a stock 8600/300 with 256 ram & 4 G HD.  The computer 
came with OS 9.1 loaded but without disks.  I played around with the unit
for about a week before I did a clean install of 8.5 then upgraded to 8.6.
The video was fine for the first week that I used it but just prior to
installing 8.6 the cursor went crazy.  It showed a long vertical line on the
screen instead of a the standard cursor.  This was a full line from top to
bottom that move back and forth across the screen as I moved the mouse.  I
zapped the pram and got a normal cursor.  It worked normally for a about an
hour then the screen showed stationary vertical lines of a different color
about 1/8 inch apart across the whole screen.  Since the computer had been
crashing fairly often with 9.1 I thought that might be the problem and
installed 8.5 - 8.6.  This did not solve the problem.

The vertical lines still show across the screen.  Initially they were stable
but now they fad in an out occasionally.  The video acts as if it may be
picking up some type of interference. The monitor is a NEC 17" Multisych
attached to the built-in graphics port using a fixed (no switches) adapter.
I tried a second NEC monitor that works fine on another computer and the
lines appeared on it too.  When I used the second monitor I made sure to run
the video cable away from all the other cabling to avoid interference but
that made no difference.

I have a different VGA adapter I will try tomorrow when I get back to the
computer.  Hopefully this should give me an indication whether the adapter
is the culprit.  In the mean time I have a couple of questions.

1.    Does anyone have suggestions on other things for me to try?

2.    I have a Rage 128 PCI video card from my B&W.  Is there anyway for me
to install that and use it as the video input for a single monitor?  I know
I can use it in conjunction with the built-in video to run two monitors, but
can I use just the Rage card with a single monitor?  Sorry for the long
post.

Thank in advance!

Tom

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