I bought a Nvidia 9600 Gt that was an open box on clearance for $18 it was normally $129 it worked fine for 3 weeks then one day it would only display at 600 x 800 w/16 colors.
I lost my recipt for it so I could not RMA it from the maker so I remembered some guys had some success baking the card in an oven to fix it, so I googled it and sure enough found the instructions and tried it took off the HS/Fan 375 degrees for 15 minutes and it worked.
I dont know how long it will last but all I know is it is working
Thats actually a common fix we do with old circuit boards we used to work on... a butane solder torch also works.
It melts the old broken solder back into place so it makes contact with the board again.
Good to know it works on boards as small as graphics cards too