I ordered mine on ebay, and they said that after they replaced the battery, the hold switch no longer worked. So when I got it, I opened it up. The internal part of the hold switch that connects to the button outside was connected to the logic board, and mine was broken off so there was nothing that the outside button could attach to. I am no techie, but I am pretty sure in order to replace that part, you may have to replace the logic board. Or if it is not broken, and you attempt to slide it back into place so that it can catch the hold switch, do so with caution because if it breaks clean off you will have more problems.