What causes the loss of sound problem on the MacBook Air?
Recently had my MacBook Air rev A hinge fixed at Apple Store in the UK and they fixed the loss of sound problem by replacing audio board and cable.
Its known that the hinge problem in early MBA models was a design issue that Apple now fix but does anyone know what causes the loss of sound problem and why its a hardware fix please?
Also, given that both are now fixed, is this now a permanent solution in both cases please?
Finally, why is there no statement on the hardware fix for loss of sound on MacBook Air, like there is for the hinge problem please?
Potential fix In some cases, this issue can be resolved by clearing audio caches. This can be easily accomplished with a tool like OnyX.
In other cases, resetting PRAM/NVRAM can resolve the issue. In order to reset PRAM/NVRAM, shut down your Mac, then start it back up while immediately holding the following keys: Command, Option, P and R. Hold the keys down until the computer restarts and you hear the startup sound for the third time.
In still other cases, this issue can only be resolved via authorized Apple repair. Contact Apple support or bring your MacBook Air to a local Apple retail store for assistance.
The same thing happened to me. A one of the posters (Mayer) suggested take it to an apple store first before taking apart your laptop. I did the complete opposite and bought everything from Ifixit.com. I fixed it myself with no problem, but the problem happened again when all the hinges broke.
So my suggestion is let the apple store do a diagnosis. You may get everything fixed for free. If you read some of my other posts regarding my Macbook Air hinge problems almost every single thing was replaced and it looks / works like the day I bought it.
I just encountered this problem having previously resolved audio issues via the OS I needed to replace the audio cable this time. Easy enough fix if you're willing, took about 20 minutes once I had the part.
I examined the cable I replaced and could see nothing obvious although I did note that the cable doesn't quite sit as nicely as I would have liked, it is possible this will cause stress to the cable over time and the problem will reoccur. But given that I have has the machine since it was first launched (I forget exactly when that was) it doesn't worry me too much.