Line in Era 100 - connected but no sound

What happens if you Group with another Sonos?

What happens if you select the line-in from another Sonos?

Ok, from your screenshot, the Sonos recognizes the line in (something is plugged in), but don’t get caught out by the bouncing lines, they aren’t measuring anything. 

There are a couple of things I’d check. Both of which you’ve probably done, but just in case…. First, check to ensure the cables going to the Sonos adapter are plugged in correctly. This screenshot is indicative to me of the Sonos line in adapter not receiving a line level signal. Next, check your pre-amp (is it internal or external?) to ensure it is set to ‘Line’ and not ‘Phono’. 

If neither of those are helpful, I’d call Sonos Support to discuss it.

When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.

Thanks. No difference if I group the speakers. I have a lot of Sonos but only this era 200/ speaker with line in capability. Internal pre amp with only off and on switch , not sure if I understand the line in and pre amp suggestion. 

What are the two position labels on the internal pre-amp? Normally speaking, they should be ‘Phono’ and ‘Line’, but they might be slightly different on your turntable. You’d want the setting for ‘Line’, and it might be worth flipping it back and forth a couple of times. Sometimes, they don’t make appropriate contact. 

What did Support say, when you called in?

All your Sonos should be able to select the 100s line-in as a source.

https://support.sonos.com/en-us/article/use-line-in-on-sonos

https://support.sonos.com/en-us/article/adjust-line-in-settings

Many more articles here

https://support.sonos.com/en-us/search?q=Line+in

Which Argon turntable do you have?

I have the MK ll. 

There is a TT Mk2, and a TT-4 Mk 2?