Did my video card overheat or something?

All the icons are gone! This happened while I was working on a project. I tried closing AutoCAD and reopening it, but the problem is still there.
The video card is a 64MB AIW 9000. The video card is not overclocked. I actually had that same problem while working on a different project about two years back, with the same card but in a different PC. That time, it solved itself after some waiting.
Is it merely an overheating problem or is the video card bad? The PC is a 2.8GHz P4, 1663MB RAM, Windows Server 2003.

looks more like a software error than anything to do with a vcard

I'm thinking it has something to do with hardware because I set AutoCAD to use its own software renderer and I could see my work. The icons are still gone, but at least I could work!

Is it a pirated version? That could be the problom

*looks at the "Educational Version" tag*

I would say the card held out last time but for CAD work it seems a bit small. As far as him using a Ed version thats ok as long as he is a teacher or a family member is. IMO buy a better vid card with more power for that kind of work.