Tried that, it didn't work for me, unfortunately.I plugged in one of those full size to 3.5mm toslink adapters into mine as I felt the door was a bit loose. Tightened it up nicely, although you do have to use 3.5mm toslink cable. Not sure if it will work with a busted door but could be worth a go as they are only a couple of pounds
Had to have my WiiM exchanged. We'll see how it is on a unit from a new batch