You may have DC voltage on both outputs. The protection relays are cutting in to prevent frying your speakers! Your amp needs servicing by a competent tech.
Rogue Sphinx issue
Just picked up an older Sphinx integrated that, I was told, had a dead left channel. Got around to hooking it up today and can't get anything out of it - neither channel seems to be working now. I get a crackling out of the speakers if I remove the cables from the binding posts and there is a click inside the unit. I assume the click is some type of protection circuit? Just guessing of course.
I checked all of the fuses and the 2 signal tubes and they all seem to be fine. Tubes are supposedly new. Going to reach out to Rogue and my local tech but just thought I would pick the brains of the techies here.
Any thoughts greatly appreciated!