I have an old computer I was trying to fix for a friend and its getting that atidvag error.. I tried reinstalling driver and I even re formatted.. And now the VGA controller seems to be re installing itself over and over then I blue screen and re boot..
cpu AMD 1800 Barton
MB Asus A7N8X
Radeon X800 256mb
So if anyone as any ideas it would be a huge help thx..:)
is the fan spinning? the power connector plugged in?
could be heat, could be unstable voltages.
take a clean piece of paper, fold it in two and slowly clean the contacts on the agp connector. also look for missing/broken 'traces'. and also look in the agp connector, see if everything seems fine there(i.e. no dirt, broken off pins,etc)