Sonos Arc

I think I have the same problem. Bought a second Arc with HDMI attachment to SONY TV and despite trying several times - including wiring the Arc to another SONOS amp,)  I cannot get  SONOS to let me finish registering the new one. It will always commence the start up process (including on one occasion   an attempt to start the trueplay ) and on another it gave me the chance to connect via my wifi network via the router. But then everything sudenly stops and becomes ‘a problem’ and therefore registration is never completed. One clue from diagnostics is that all my kit is on the SONOS mesh whereas the only invitation I get from the new Arc is to agree to join my own wifi network. Also only one other SONOS speaker is wired via switch to the router. I just hope this is SONOS problem but I would welcome learning more about your experiences with the new Arc.  

Ok the arc is now registered on the app and has connected to the internet. Still can’t connect to tv as it states there is interference from an HDMI device and to unplug all home theatre products. Done that and it now says there is an update for the arc but can’t download it as there is an error code 1002 so still not fully connected 

I have received the same error code a couple of times. The ‘fix it’ offer in the dialog doesn’t work although the latest controller update notes for IOS suggest this has been resolved. I cannot get any pc Windows controller access at all now which was worked perfectly on S2 before all this went haywire.