Thanks Lee...still sitting here trying to figure out a solution

It can't be the MB since I did swap it out for another of the same
model.

"... 3. I replaced the motherboard - same problem, no change..."

I did get windows to install but I can't get past the first blank
windows screen...the mouse pointer just sits there, occasionally
"thinking" (hourglass pops up for a sec)...

I also disabled everything that was suggested and, other than
everything running REALLY slow, I'm still having stability problems...

The "lines" come and go intermitently now...it seems that once the
computer is on they don't show up much. They show up more when I power
down, wait a couple seconds then power up again. But regardless of
wether the lines are there or not, I'm having stability issues and I'm
unable to fully get to the WIN98 desktop...

I have my eye on a few processors on ebay as my next step....either
that or a PSU...I'm stumped.