No Sound from Front Right Output

I'm getting no output on my right front channel. I've checked everything - it must be the channel's output. The input worked fine when I switched it with the left input. Any ideas? I had an amp problem when I first got this amp years ago and I have no desire to send this heavy beast in again.

I hate to say it, but this sounds like a job for the Outlaws.
I see your point about shipping back a 90 lb amp.

Talk to the Outlaws. Maybe you could just send the defective channel in.