Nad c-370: Right Channel drops out

Maybe a shop/dealer that's been around for a long time selling upper end gear.If they don't work on your brand,they might have a good shop to go to.A dealer in my area that could be trusted with anything retired.Nobody bought his business most likely because he was mainly a stereo guy.With the new tv's,everybody wants multichannel home theater. Last resort I guess like suggested above, shipping out might be the best option.Packing,shipping, bummer.

I know there is sometimes special knowledge involved, but really. Once a tech has the schematic and test values what could possibly go wrong? Mechanical disassembly except in special cases is pretty routine.
The only 'glitch' in the ointment would be proprietary parts / devices or, for example, the 'potted' gain cell circuitry in my PS Audio integrated. I don't see NAD using any such parts or devices.

Any tech should be able to fix a NAD amplifier unless a board has been charcoaled.

10-11-09: Magfan
I know there is sometimes special knowledge involved, but really. Once a tech has the schematic and test values what could possibly go wrong?

Well that truly made me lol. Magfan, I'm guessing you aren't a technician.

Well, as a matter of fact, I've worked on semiconductor processing equipment for decades. I was expected to be able to fix darn near anything, at least to the board exchange level with schematic, knowledge of how it was supposed to work a meter and scope.
What's the big deal? It's just an amplifier.
I know I simplified things, but after all, if you are dealing with a professional analogue tech who is familiar with amps, preamps and can align an FM tuner or use a tube tester (for vets only) I don't really see the problem.
Is how this stuff works a mystery? Do you need to be admitted to some cults inner circle? Is fixing stuff Masonic or Religious?
Nope, it's just electronics.
Sound technique and reasoning will get you thru many fixes with no special knowledge. Maybe not even a third, but you can really fix stuff without resort to dead chickens or tea leaves.

Back to the OP. See where he writes::
'I can get the right channel to come on if I tinker around with the amp by switching source inputs form CD to Video and so on.'
I don't know? Cold Soldier? Bad Switch? Bad Switch logic if it's logic or relay driven switches?
Point is, this is not voodoo or rocket science. It all works the same way. Same principles, same parts (mostly not proprietary) and a volts a volt.

Granted, some techs are better than others. I, personally, was only OK at semiconductor equipments electronics but very good at mechanics and troubleshooting / reasoning. A good tech is certainly worth knowing and cultivating. It's a gift.

Magfan, your second paragraph had me chuckling again. I'm not arguing the logic you put forth, it is a rosy picture though.
Agree 100% with your closing sentence. I have known a few truly gifted techs.