I have a ZX700 on my camper, tried to use Mom's MP3 player via USB. Nothing plays.
One day, I want to use her MP3 Player (RCA) into the ZX700 via USB, and turns on or switches to USB automatically, and it still, loads, but no music plays, time doesn't move, just silence, but I can still change tracks with the next and previous buttons and still no music, but I can still see the info, but there isn't anything to do with it. I tried to hook up her MP3 player with an AU1 cable and it works fine. I tried to use a normal SD card or USB Flash Drive with music on it and it still works fine.