Fixed audio and video - developed battery issue

Mein Problem

No audio on MacBook air. Video wouldn't play either.

Meine Reparatur

Everything went smooth. Followed instructions, all went well. However, after restarting and plugging in the charger, the MacBook air no longer charges. I'm guessing something with the battery was damaged. I can't imagine what happen. I was extra careful and everything went smooth. I'm stumped.

Mein Rat

I would make sure the computer is powered down before starting.