You might not need to buy a new graphics card which can be expensive and only adds to environmental waste! How to fix your video graphics card by baking it! My video card is a Nvidia 8800 Geoforce GT. Squiggly lines showed up on my computer! Remove the video card from your tower, remove the screws, clean off the thermal compound paste with qtips and rubbing alcohol, place the card face up on 4 tinfoil balls on a baking sheeting, preheat oven to 375ºf and bake for 10 minutes. Remove from oven and let cool for 30 minutes. Put the video card back together and put it back in your tower, start up your computer, cross your fingers and hope for the best! This worked for me, no guarantees that it will work for you! Make sure you use oven mitts!