
If it was the same solder issue as the 2011 MBP, then perhaps more aggressive use of the GPU in HS could be the cause. So if indeed you have the GPU problem, it was either a coincidence of it occurring after you upgraded to HS or there was something in HS that caused it. This is related to a couple of points I'm going to make later in my post. I don't know if that also applies to the 2012-2013 retina MBP's that was part of the repair extension program.

With the 2011 MBP, the GPU problem was due to the solder (non-lead) that was used. If I need to purchase a new computer, I will prefer to wait and see what the 2018 MP will offer. I would appreciate any advise & feedbacks.

In the middle of installing OS HIGH SIERRA computer screen basically shut off on me, authorized Apple retailer told me the system crashed during installing the OS. I was running OS Sierra a month ago, my biggest mistake was updating to OS HIGH SIERRA. I feel like they are just trying to dig into my pocket. So currently I have a non-operating MP and I'm not sure what to do. Initially took it to an authorized Apple retailer they also told me its a software issue and to delete the disk and reinstalling OS will fix the issue. So today I took it back to the Apple Store this time they told me it's a video card that needs to be replaced $575+tax.
#Motherboard replacement for mac 2012 retina install
I went home backed up all my data and deleted the disk and reinstalled a clean version of the OS Sierra, however, during the install process screen shuts off on me but the computer is still running in the background (keyboard lights are on and the fan is working).

I took my out of warranty 2012 MP 15" Retina to Apple store due to GPU failures & screen shutting off after updating to OS High Sierra, after running a diagnostic they found no hardware issues and told me to delete the disk and clean reinstall of the OS system will fix the issue.
