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Pram Battery Lack screen 2minutes lights up

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(@Frank)
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Joined: 8 months ago
Posts: 1
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hi Great site love it

My 2011 Imac 27"  12.2     At Startup the bong sounds but the screen stays black  two and a half minutes later the screen turns white and continues to operate normaly.  This black screen  2.5minutes Happens at any start or reset. So installing is impossible.

The GPU seems to work fine otherwise  Could This Be The Pram Battery ? 


   
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