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Possible workaround for blank screen after sleep
Authored by: gordiannii on Dec 30, '10 04:24:29AM

I had the same problem: MBP 2007 suddently does not boot (no chime, black screen). I brought it to an Apple Service and they tried to run the keyboard based PRAM reset (hold P+R+Option+Commad Key during start up) and the POST (power on self test: remove ram and see the light flash once per second) without any luck. The solution was that I had to reset the PRAM physically by removing the internal PRAM battery and plugging it back in and then on immediate restart run the keyboard based PRAM reset. After this the notebook booted fine with chime and black screen. I brought it back to the Apple Service and they could run the NVIDIA graphics test with success. Now I get a free logicboard replacement.



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