You're either attached to your LCD monitor via D-SUB (the 15-pin monitor cable on your video card), the S-VIDEO output, or component output (the three RCA cables). These are analog signals, which are subject to refresh rate (exactly what is causing your flickering). The refresh rate you're using obviously is not the refresh rate of your monitor.To completely eliminate the problem, you must go digital. Many modern video cards in today's computers have a DVI output (a connector similar to your VGA D-SUB connector, but longer and a different pin configuration). You will also need a DVI to HDMI adapter cable.Power down your computer. Hook the DVI part of the cable to your computer and the HDMI part into your LCD screen. Turn on your computer and screen, select the HDMI input on your screen, and you're good to go.Going digital will ensure you don't see that flickering ever again, and you'll notice the increase in general picture quality immediately.If you don't have a DVI output on your computer, you can most likely find a budget-quality video card for your system for $60 or less.
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