HT201177: Get help with video issues on external displays connected to your Mac
Learn about Get help with video issues on external displays connected to your MacQ: When I turn on my MacBook Pro, the apple appears in the middle of the light blue screen, the little circle below it rotates, but n ... When I turn on my MacBook Pro, the apple appears in the middle of the light blue screen, the little circle below it rotates, but nothing else happens. Any suggestions? I've let the battery run down completely on several occasions. more
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Mar 21, 2014 1:25 PM in response to Lucille Walterby OGELTHORPE,First, keep your MBP connected to the power adapter.
Perform SMC and PRAM resets;
http://support.apple.com/kb/ht3964
http://support.apple.com/kb/ht1379
Then try a Safe Boot:
http://support.apple.com/kb/HT1564?viewlocale=en_US
If no change, then make an appointment at an Apple store genius bar.
Ciao.