I've been having a problem with "shadow" streaks across my screen for a couple of months. I've determined, by trying another monitor, that it's not the monitor; I've also changed the resolution, colour depth, and refresh rate with no change in the streaks. They are not fixed streaks but rather they correspond to what is on the screen--high contrast things, specifically black text on a white background. Depending on the contrast and the size of the thing causing the streak, each streak can vary from pale grey to charcoal grey, and it reaches from one side of the screen to the other. I do alot of graphics work, so this is obviously interfering with my ability to do that. My graphics card has been reseated, so I don't think the connection is bad. The card is a Creative Labs 3D Blaster Annihilator (NVidia), using the Creative drivers provided on disk. I haven't tried updating the drivers, but I doubt that could be the problem--these streaks appeared suddenly one night while I was away from the computer for a few hours, but were completely not present ever before (I had not installed any new software or hardware previously).
I'd appreciate any help anyone can give. Thank you very much.