Take it in to an Authorized Service Provider and ask them to test it for this repair:
https://www.apple.com/support/macbookpro...
MacBook Pro Repair Extension Program for Video Issues
Apple has determined that a small percentage of MacBook Pro systems may exhibit distorted video, no video, or unexpected system restarts. These MacBook Pro systems were sold between February 2011 and December 2013.
Apple or an Apple Authorized Service Provider will repair affected MacBook Pro systems, free of charge. See below for details on affected models and service options.
Symptoms
An affected MacBook Pro may display one or more of the following symptoms:
Distorted or scrambled video on the computer screen
No video on the computer screen (or external display) even though the computer is on
Computer restarts unexpectedly
Products affected
15-inch and 17-inch MacBook Pro models manufactured in 2011
15-inch MacBook Pro with Retina models manufactured from Mid 2012 to Early 2013
Do not use the identify your coverage from this site as it only tells you about your original warranty, not the program.
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4 Kommentare
Give us the full systems serial number so we can cross check what you have.
von Dan
Dan where are you going to check serials now where I've always gone is being flagged her as spam
von Jimfixer
MacBook Pro 15" 2.2 GHz i7 (Late 2011)
von Dan
@jimfixer - Here: EveryMac and my Apple Service Account ;-}
von Dan