Help! Full screen apps minimize with X1800XT.

Joined
Jul 16, 2006
Messages
57
My brother has a sapphire x1800xt 512mb. It has been running fine since the middle of april. A couple of days ago it started acting up. When he tries to run a game it will come on in full screen then it will minimize to the desktop. Usually it doesn't even get past the first logo screen. This happens on all full screen apps, basically games.

Here is everthing I've tried:
Reinstall games.
Clean and reinstall the latest drivers.
Reinstall windows.
Pull and reseat card.
Clean card fan.

System specs:
AMD athlon 64 3700 skt 939
Asus A8N5X
Sapphire X1800XT 512MB
Antec Neo HE 550W
2gb Patriot PC3200
160gb WD sata

Any help or suggestions would be greatly appreciated.
 
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