NinJar

On startup my computer will show a "corrupted" display with dots and lines everwhere. It then fails to recover. Rarely it will run fine but the fans run overtime on i presume i need to get a new cpu cooler. The failed startup happened on my previous motherboard, i have changed motherboard and the problem persists, im not sure if the graphics card has died or windows is corrupt. * Windows 7 - 32 bit edition * Gygabyte motherboard * GeForce 8800gt graphics card