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10.7: Disable internal laptop display when external display is attached
Authored by: tomhayes on Oct 20, '11 02:08:01PM

This completely hosed my amnchine.

I issued the command and rebooted. The powerbook came on (chime) with the internal screen grey and then the computer immediatly itself off.

Same thing happened the next 3 times.

I zapped PRAM using the keyobar (opt-apple-p-r-) 6 times in a row and still ahd the same issue.

I booted into recorvery mode (option-R) and issued the second nvram command using terminal. Rebooted. Same issue still.

I need help - I can't use my machine at all now.



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