It was the fuse!. There was a spare fuse inside which was very helpful as I didn't have to worry about the quality of the replacement.

Thanks all.

Oppo UDP-203, Sonos, Nvidia Streamer, Fire TV 4K, Trinnov Altitude32 into Dan D'Agostino Momentum into Wilson Alexx, Paradigm Sub 1, Monitor Audio In Wall surrounds, JVC NX9