On the headphone audio cable, there is a small black "bubble" with small metal part near the white hole to fix the jack to the ipod case.
Do you think this small bubble can be a fuse ?
I've replace the cable with success, power and volume works, but have sound only on the right earphone. After some try, i have no more sound !
I've made some test with a multimeter to check continuity from the 4 jack pin to the motherboard connector and it's seems that there is no connection. I have done the same test on the old cable, and i found continuity for all pin (groud, mic, left and right)