Ursprünglicher Beitrag von: Ben ,
The headphone jack has a switch element within it it looks like that’s broken or messed up some how. Did you plug in a headphone which was an odd length or size? It could have damaged it. Luckily Apple changed the design so you can replace the jack! It’s just not that easy. You’ll need to take the logic board out to get behind it to remove the jack assembly.