Nad c-370: Right Channel drops out

what would I use to clean volume, balance and input switches besides compressed air Magfan?

Well, Tbone, I don't know.
RadioShackup has some stuff. Read the label, then the same label at the 'audiophile' shop which will be 5x the cost and probably the same stuff from the same pipe.
Use per directions. I HAVE NEVER USED THIS STUFF, so I don't know any potential downside.
REPEAT:: I have never used this stuff, so read the can. TWICE.

Also, I know it isn't fair, but women STATISTICALLY pay more for cars than men, even comparing identical cars / equipment. So, when they see a woman come in to pick up some electronics, they feel free to BS away, even if it is another woman behind the counter.....Isn't sisterhood powerful?

I don't know current (no pun intended) practice, but large caps come with screw on contacts. These are easily replaced, if they are connector up. Sometimes there is a band around the bottom, sort of like a hose clamp, to keep the caps mechanically secure. After everything has been unplugged for a couple hours, it should be OK to service. WARNING.....WARNING:: Caps typically come with some 'bleed' resistance across them, so they won't hold a charge for long. If these resistor(s) are defective a cap can hold a LETHAL charge for quite a while.
If you aren't comfortable with this procedure, have a REAL tech do it for you.

If you believe in 'audiophile' caps, you can either specify at time of work order, or bring 'em in yourself. Cap size can vary, even for same rating, so be careful there, too.

Now that I've either A) scared you or B) confused you, please feel free to follow Kotta's advice. Probably better than mine!

Seldom is it cost effective to repair any electronic unit where the original, new cost was less then $1K. Typically any repair will cost $180 plus. and that is just for the estimate and shipping cost. Think about it, a used, in perfect operating condition unit that cost $1K, is worth no more then $480, tops. Better to buy a new unit, with a three year manufacturer warranty, and sell off the old one for parts. Repair of electronics in the $1K or less original cost is an oxymoron.

I ordered a musical fidelity a5.5 amp as soon as I got the news on the NAD. Remarkable improvement in sound stage over the NAD plus I can hear details that I never noticed with the NAD. I am pretty happy with the step up but now I need new speakers to replace my old Klipsch KG-4's. Harbeth and Spendors look appealing. Anyone have any recs on speakers to pair with my new amp and arcam cd23t CD player? I like the look of a more traditional box type speaker rather than towers or some of the oddball looking stuff that is favored by many. My room is about 15' x 20' with carpet and a 10 foot ceiling. Rock and Roll and bluegrass are my main choices in music. I like to feel the bass as well as hear it.

Is a busted NAD worth anything?

Put the busted NAD on ebay with disclosure.