Hi everyone. I'm having a very irritating problem with my stock 8600/300. I'm using the built-in video card (max VRAM & 128MB RAM) with OS 9. I've used both my AppleVision 1710 and 17" graphite CRT (using an Apple VGA to DB15), but the image comes in with thin vertical lines evenly spaced across the screen with two large vertical lines on either side of the mouse that move with it. The background (what can be seen of it) is in color but almost looks solarized. Even the composite out to a TV is line-ridden.

I looked at the mobo and contacts and everything is clean, in fact they look brand new. No rust, corrosion, bending, or dust. I even put in an ATI PCI card, but it was not recognized and all I got was a blank screen (it worked in my beige G3 OS 9.1). Does anyone have any ideas? :-/