on 2013-08-28 15:47 Stan Halpin wrote
On Aug 28, 2013, at 5:36 PM, Steve Cottrell wrote:
Backlight is on, dark screen but the mac is outputting 'dark' to the
screen. Logic board? could be.
Screen-brightness key on the keyboard: does that affect the situation?
try a restart with command-option-P-R (all four keys) held down; this resets
the PRAM, which may hold an errant display setting
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