Is this a failing GPU?
Please check the photo below.
Is this a failing GPU?
If so, this kind of fault seems rare on those Retina 13-inch 2015.
I tried to plug an external monitor, and it shows plain grey, nothing else on screen.
Would that be solved by reballing?
How can I go about this?
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A1502 never fails for Video. This issue is a screen issue. If the external monitor shows plain grey could be that is asking for the password or your thunderbolt id dirty.
in case your logic board is defective could be a filter communicating pch with screen or just water damaged. take it to someone that can do a quick check.
из Juan Corredor