First check the resolution and refresh rate for your video graphics adapter. LCDs are apt to blink when not at 60 Hz. (Recently I had another client with that issue.) For Windows 7, right click on the desktop and choose Screen Resolution. Click on Advanced Settings and the Monitor tab. (Other versions of Windows will have this in a similar area or Control Panel > System > Display in some combination. Mac and Unix have this setting somewhere as well.) Also make sure that you are set for the native resolution or one supported by both the monitor and the graphics adapter.
Next check the temperature of the system. Improve the cooling of the system if the graphics card is overheating.
I hope this helps.
Cindy Wells
(who had the entire computer shut down when the graphics card overheated using full-screen video for on-line video. That was a major heat issue that had the CPU heat up too.)
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