Does the P-6860FX Gateway laptop have a built on video card? I found that it has a 512MB NVIDIA GeForce 8800M GTS. Its been having all different color lines in the screen. I hooked it to an external monitor and its the same. The pc does boot up normally. If it is an off board card any recommendations for a replacement? Are maybe a fix if its onboard.
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Try loading up a updated Driver for that Card,firstor rolling over the driver ,if no go replace card in laptop