Biostar T Force 965PT775
Core 2 Duo 6300
e-GeForce 7600 GT
Patriot 667 memory
Western Digital Cavier 250GB SATA II
OS = Windows XP
Two days ago, I walked into my computer room and found my screen black. I rebooted and heard 3 beeps (1 long, 2 short). After looking up the bios beep codes, I realized that my video card was probably dead.
Yesterday (!) my new video card arrived from Newegg: the eVGA GeForce GT 240 (512MB DDR5, PCI-E 2.0).
Upon installation of the card and driver, I saw a very garbled image. I could read text, but the graphics were very distorted, colors way off, and instead of a mouse pointer, I saw a large square (~50x50 pixels).
I also tried downloading the latest driver, but I experienced the same problem.
I registered my product with eVGA and asked them about the problem yesterday, but still haven't received any help.
Discoloration and artifacts are usually a clear sign a video card is defective, but since your old card is completely dead, it's possible there's a problem within the motherboard, or possibly even the power supply. Is there any way to test the new GT240 (and the old card) in another system? A friend's PC maybe, or one at school/work?
It's possible you have a corrupted driver installation, or a bad driver file or package. You could always try downloading and reinstalling them again. You could also try using a different driver version. The most recent driver isn't always the most stable for every model...