Monitor screen video problem

While I am working on my computer, my screen suddenly goes dark with lines flashing across it, the cursor disappears and I can't do anything on the computer. Its an AMD Athlon 64 X2 3800 with a Seagate Barracuda 160 GB hard drive. It isn't the monitor, as I put the monitor on another computer, and it works fine.
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More about monitor screen video problem
  1. check your video card and did you use the same cable to test the monitor
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