Running win2k server 256 MB Ram, amd k62. Every once in a while, my monitor will get lines running horizontally across it, and it gets worse and worse until I cannot see the screen. This does not happen during boot up or in VGA mode. It will do this for a day or two, and then it is fine for weeks or even months. Checked the hardware with a video test, checked for heat and all temps are fine. If it never happens during VGA mode, could my video card (diamond) be failing? But if this is so, why do all the tests on it come out ok?