I think you over cooked your board ;-{
I would search out for a 2012 logic board. Its a direct drop in! The only issue you’ll have is the LVDS cable connector needs a light modification. You’ll need to take a nail file and carefully grid down the edge ever so slightly as the width of the tang is larger on the older cable. It only takes a few even strokes to fix.
The system I’m banging away on right now is a early 2011 which the GPU died and upgraded the logic board to a 2012! Its been running strong since then.