I have several Play 1, PLAYBASE and a Boost and a friend gave me an old ZP100 as I wanted to connect my garden speakers to my Sonos system. However, I have connected and factory reset and I can't update the firmware. Once I remove the ZP100 from the system it all works perfectly as before, when I do connect it start the update process but won't complete it. I suspect the version it is on may be to old to communicate with my controller, any ideas would be great as I am not in a position to go and buy a new Amp yet.
Thanks in advance.