Nad c-370: Right Channel drops out


I took my NAD to a local repair shop to investigate why the right channel goes out on my amp and they proposed to charge me $420 to install a main amp kit, a filter set plus labor. Needless to say, I paid them their $70 "diagnostic fee" and brought the Nad home, unrepaired.

I am a bit baffled because 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 have been reading on the internet about problems with these amps due to capacitors overheating and bugging out. Is there a particular capacitors or group of capacitors that I could replace myslef and get my rig running again?
tbone1
Tim,
I think the main thing is to shop techs. The OP was not served by the original guy who saw $$. In all my years of fixing stuff and as a process technician in a place making integrated circuits and discreet, the #1 thing I learned was to get a good description of the problem and what happened.
Asking the right questions are critical.
People don't realize they are setting themselves up with stuff like 'It's broken'. The more info a tech has, usually the better.

Is the NAD still available for inspection? I'd sure like to see it and try some contact cleaner. Worst case is you're no worse off than you are right now......

When I brought my old Carver Cube (M400t) to the tech, I was able to give a pretty good description of what / when / where and the POWER GLITCH that took it out. The electric company bought that fix for me, since I kept good records and knew exactly when my amp went south. What a Chinese puzzle box it is. It worked another 5 or 6 years after the fix, so I guess I got my $$$'s worth.

I've never worked hi-fi but this amp doesn't sound too broken for a little experiment. You may get lucky and fix it. Contact cleaner, anyone?

My preamp for the Cube was a Kenwood integrated amp that I cracked the case on, and found (sheer luck) that the main board and preamp board were strung together with jumpers. snip snip / solder and I had a preamp which lasted until I could afford a real preamp.

Rosy picture? Sure! My pleasure! No harm in trying something rather than getting a 400$+ bill for a repair. Always ask for the parts back, too. Sometimes my rants make me laugh, too.
thanks Mag fan. I'll try blowing it out with a can of compressed air and then follow up with the contact cleaner. It looks a bit furry inside. I have have dogs and cats and unlike most audiogoners who post items for sale, I smoke like a freaking chimney!
Some audiophiles do an annual cleaning. Others will pull / clean connections and use contact stuff on 'em. I try to keep my gear is a dust resistant area, while still keeping warm running stuff cool.

Smoking and pets are deal breakers, for sure. Cats are the worlds only source for real cat hair.

Are the switches mechanical or electro/logic? I guess I gotta look up a picture of this amp!
I am not sure what type of switches the amp has. I will try the cleaning this weekend and see what happens.

Surely more audiogoners have pets and smoke than what the for sale adds would leave you to believe...
It's notable to me that (much like British cars)for all its positive qualities NAD simply isn't reliable as a brand--these forums are full of NAD gripes and problems. Thinking back, I've owned five or six NAD pieces (amps and sources); all but one had issues. Correspondingly, comparably positioned gear from rivals like Rotel and Integra seems indestrutible.