Problems with my Tri-Vista 300--Need some help


My new Tri-Vista integrated has worked beautifully for a month, but yesterday, for the first time, I discovered that no sound is coming through the right terminals into the speaker. I tried shifting speakers and cables around and found that it has to originate with the amp. The amp has two sets of binding posts, but in changing the speaker cables to either of them, I've still gotten no sound out of the right side. Could this be a problem with an internal fuse, and if so, and since I have no MF dealers here in Korea (I bought off the net), what might be my options in terms of getting the amp repaired? Any suggestions?
washline
Washline,
My Denon does the source selector thing! The most annoying thing! I had been extremely busy, and then very tired, and then when I felt up to dealing with it it stopped as mysteriously as it started. Funny thing- I thought I would be relieved to read that someone else had this problem, and I am in part. But it is frustrating not to understand how my amplifier works- as it must be for you, especially when everyone must seem miles out of reach and real information a real commodity. It puts my situation in a new light, and I thank you for that. I wish I could tell you I had your amplifier( for all sorts of reasons) and that I knew why the source selector behaves this way and what to do about it. I would love to tell how to deal with that. I would love to be of some help! All I can really do though is admire the intelligence and patience you have displayed in sorting out your problems. The input selector chip seems a reasonable quess. Hopefully others here have had this problem and will be able to help you figure it out, and that MF will offer some insight too. In the meantime, even as my lowly, but much beloved Denon is behaving itself I am resolved I will learn something about these amplifier related quirks, and if I learn anything soon enough and reliably enough I will try to pass on what I have learned. I am sorry you have to put up with all this ( my long post included) and I wish you luck.
check that. Inexplicably, the source selector has started to work properly again. Don't know why. Who can figure out the idiosyncrasies of circuits and electricity. I'll keep my fingers crossed in hopes that the selector continues to work properly. In any case, what a gorgeous sounding amp.
Timf, I thank you very much for your post. It seems as though our problems are very comparable both in development and solution. Like I said, who can truly grasp the strangeness of circuits and electricity. Even the best equipment can develop such strange, seemingly uncaused problems.