so I think I narrowed it down to a ethernet connection problem. Yesterday all worked fine. My ethernet connection coming from an 8 port tplink home switch has other devices connected like a MAG275 iptv box. If I plugged the macbook ethernet cable straight into the router, no problems. Plugging into switch, did/didn't work, or MAG275 couldn't connect to internet.
My thought was that tplink switch broken, just got a new one, plugged it all in and everything worked fine for 3 hours when the MAG275 stopped working - no internet connection. Took the ethernet connection from the MAG275 and plugged into macbook, speedtest worked great. Rebooted all devices (router, switch, MBP and MAG275) now only Apple TV still works on the switch but MAG275 and the MBP do not get a connection.
Ran FING in iphone app to check IP addresses but no sure if IP address conflict would show up? Connecting MBP with wifi works ok (using that now), ethernet connection coming from switch does not seem to work again.
If I leave Ethernet connected to the MBP, I cannot connect with wifi. If I physically disconnect the ethernet connection (thunderbolt) then the wifi does connect
