Crashing during startup

Regarding my macbook air from 2013..

So I used to have the problem where I would use my earphones in the computer but the sound would't work, and what "solved" that was to restart the computer. This problem seemed to have been fixed for a while now, but then today it happened again. No sound from my earphones so I thought I'd restart it. But then there was another isssue, it seems.. because during the startup the bar loads to about an half and then the computer just crashes.. I've tried safe start, SMC and PRAM.. The problem remains..

My old mba (2011) had a similar problem but it just stopped staring at all, and it was too expensive to just fix a relatively old model so I bought a new one.. So hopefully this can be fixed now..

Any ideas?