Right channel dead on AR VSI 75

@dweller 

I had the right channel of my integrated die on me recently.

Two visits to a repair shop an hour away, a total of 5 weeks without it and it turned out to be a reasonably new RCA interconnect.

Sometimes the least likely cause, isn't.

Blown fuse?

Also, you stated you swapped speaker cables, what about interconnects.

I had a bad IC that caused this problem. Cracked solder connection.

I think I ruled out the dead tube by switching the 1 & 2 tubes with the 3&4 tubes.  Left channel still worked fine and the right channel was dead.  

Dead tube took out resistor in the bias circuit when it crashed? Happens all the time with ARC amps which have no protection in the circuit (and they are not the only manufacturer that does this).