My receiver is the Onkyo TX-SR3.3 5.1
My projector is an Epson PowerLite 1261W
My Rokus have been a Roku Express, Roku Streaming Stick, Roku XD and Roku XS (plus a sony smart tv box that didn't work)
What steps should I take to diagnose the issue?
First I thought I had bad Rokus, so I...