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Flashing Screen

S

skgolf

macrumors newbie
Original poster
On my Macbook (10.5.8), after a few minutes of inactivity, instead of going to the screensaver or snooze/sleep mode, the screen starts flashing. When I move the mouse everything comes back and seems to run normal. It's random thing. OS or hard drive problem? Any thoughts or ideas please.
 
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