원문 게시자: arbaman ,
Unfortunately that looks like a GPU failure. If it’s an A1369 from early 2012 it’s a typical issue, less frequent on 2012 A1466 but it may still happen. You can download and run a benchmarking App like Valley from Unigine, that would cause a repeated reboot or shutdown as soon as launched and would confirm the GPU failure. I’d recommend backing up your data before that, as the board may brick for good anytime.