Sometimes I get a flashing black screen for a second and then everything goes back to normal. No freeze up or anything, just an entirely black screen for a second or so. This does not happen very often, maybe once every day. My system is not overclocked and my temps are fine. Could it be my monitor? I recently changed from an old CRT to a Dell 2001fp LCD and I can't recall that I've had this problem with my old monitor. Any help appreciated. /JP

Might be; equally it may be the cable connection is not sound/secure; it could be the VGA card failing or not properly seated in its slot. If you connect another monitor does it produce the same effect (now)?

trvlr, I've disconnected and reconnected the cables a few weeks ago but I still get black screens every now and then. The videocard sits firmly in the AGP-slot. I haven't tried switching monitors yet, mainly because these black screens appear so infrequently, which makes it very hard to reproduce the problem. Any other ideas? I've been thinking there could be some virus or spyware/screencapper program causing this, but I've scanned my system with AVG and Ad-Aware without results.

Have you checked the "refresh rate" for your moniror, is it set at a rate that allows for optimum performance or one that the monitor supports.

Roberto's suggestion is one to consider; it's all to easy set a refersh rate that is just beyond what monitor can safely/securely handle - although "usually" if the display can't handle what you set it either refuses to go there, or crashes instantly. But then again? I have to say I'm thinking the VGA card itself - possibly the on-baord RAM, if not the guts of the card itself?