NO AUDIO DEVICE FOUND!
I lost audio & thought it was a software problem.
I tried everything until I came across a forum that was talking about the same problem, but with a hardware repair.
Long story short FIXIT was brought up as being a good source of parts, so I gave it a shot.
WOW the inexpensive audio cable was a snap to replace with the online photo guide.
And the problem was fixed. FIXIT fixed it.
If you have a hardware problem I would give FIXIT a try.
You will not regret it.