my screen keeps flashing as though a screen capture was being made

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Level 2

313 points

my screen keeps flashing as though a screen capture was being made

This is unnerving. At random intervals, my screen flashes. It more like "winks" - as though a screen capture was being made. Actually, when you make a real screen capture, the screen doesn't wink, but that's the impression I get. The screen doesn't flicker or flash like it's a hardware bad connection, but goes through a fast, but continuous normal-white-normal cycle.

I'm looking at my activity monitor to see if something is unusual, but I can't tell. Everything I look up seems to be real.

MacBook Pro, Mac OS X (10.6)

Posted on Jun 21, 2012 4:17 PM

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Answer 1

RADumas Author

Level 2

313 points

Jun 21, 2012 4:40 PM in response to captfred

Captfred,

This is clearly the kind of flash I was seeing, but the setting was not checked.

It may have been enabled, though, as I fiddled around iwth the sound setting because I was not getting any sound alerts. I unset/reset the sound alert, and it started working. Maybe it had somehow been reset to the universal access (don't know how), and I fiddled with it so that the sound alert came back, because the flashing stopped.

Now I know to tinker with Universal Access when creepy things happen. Thanks.

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Answer 2

RADumas Author

Level 2

313 points

Jul 31, 2012 8:52 AM in response to captfred

Argh. spontaneously, it started flashing the screen again. I checked Universal Access, and the flash-the-screen option is unchecked. I checked, saved, and unchecked, but it's still flashing. Something is amiss.

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