Green screen, distorted apple at boot up

[Cstar]

I have a MacBook Pro (15-inch, early 2011) MacOS High Sierra 10.13.2. It was working properly, no problem at all in general except pretty slow, not much memory left.

Suddenly yesterday the screen turned white. So I shut down and when I rebooted it has a greenish-white screen with a distorted green apple logo. The progress bar gets to the middle and then grey or white screen appears.. nothing happens.. the mac doesn't boot, doesn't shutdown.. nothing.

I tried to reset the PRAM but nothing, the same result. Also tried to reset the SMC but nothing, the same result.

Any ideas for me??

 

[profcutter]

Sounds an awful lot like a failing GPU to me.

 

[glenthompson]

Sounds like the infamous GPU fault. The 2011 MBP models had problems with the GPU failing with the only fix being to replace the logic board. Apple provided an extended warranty for that issue but it expired some years ago.

My late 2011 suffered the same problem and I found someone that could replace the GPU. Cost $185 and has been working great since.