Screen Failure, Graphics Failure--Options
So I wanted to try a 15 MBP and purchased a "for parts" 15 in MBP retina late 2013 with graphics problems hoping I could cheaply fix the problem. Well no dice on fixing the problem, as the LCD doesn't work (purchased A-stock replacement that didn't work) but works on external display. Did all the pram zapping etc that has been posted all over the internet to no avail.
Question is, assuming this is a logic board issue, what is the best fix? Buy new LB? Take it somewhere and hope they can fix it? Sell it all on ebay as a parts purchase?
Thanks in advance for the advice!