Q: did anyone else make this work?  I tried it five times and got NothiNG!!  Wasted about 2 hours on this.

I cannot get this computer system to function.  I keep losing sound on every thing. Why? Why hasn't Apple repaired this by now?This is the second MAc Book pro i have with this issue.  And it is impossible to get things fixed. More frustrating that anything I have ever dealt with.  I tried resetting everything via diagnostics but that is a complete farce. No SUch THIING!  The direcrions are just so much hobbledegobble. They do not work!