my primary display is flickering. I alredy changed the cable and nothing. Please hepl

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my primary display is flickering. I changed the cable and did not improve. Could be the video card? my video card is ati radeon hd 4870 512 mb

Mac Pro, OS X Mountain Lion (10.8.4), mac pro early 2009

Posted on Aug 29, 2013 4:29 PM

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Answer 1

What attachment method is being used? {Video, VGA, DVI, Mini DisplayPort, DisplayPort, HDMI, other}

What resolution is display?

Are you trying to watch copy-protected Movies?

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