Amplifier problem

I bought a rotel amplifier a year ago on audiogon (don't remember sellers name). First time I turned it on it 1 channel wasn't working. I repaired it at a place that is a mcintosh repair shop. Both channels worked after that. A few months ago only 1 works. What should I do?
Is this a Rotel RB-1080? If so, there are known issues with fuses/capacitors. Rotel has a contact site on their web page. Write them and ask - they are good about getting back to customers.
If you don't get a satisfying answer from Rotel I would consider letting this problematic amplifier go. Maybe the repair work is under warranty and can be fixed again for free.
It works now. I think it as my speaker connection. Thanks