2015 A1534 MacBook Retina 12" - No Output Devices Found

[bjf]

I have a fully functional 2015 A1534 that loses sound when I put it all back together. It comes up No Output Devices Found. If I take it apart the sound works again. Any ideas? Everything looks normal, no pinched cables or anything like that.

 

[dukefawks]

Bad flat cable to the audio board.