The Amp Quits Agin -- Am I Missing Something?

Whatever it is, it doesn't seem like an external enemy -- otherwise both amp channels would be on hols. EXCEPT if the main ground is wired onto the right channel & it blew due to trash entering the system from the mains while you were away. I hope Jc has it right, otherwise you may have an output transistor that's kicked the bucket.
Not very helpful -- we need Sean & Co here. Keep a stiff upper lip!

Ugh, as I suspected. My hope is that the channels are on independant fuses and that one of them went on me -- here's to hoping for the simple solution. Haven't checked them yet, but that's going to be the first (and likely the last) place I look when I start digging. And to add insult to injury, I just had $200 in new CDs delivered about 5 minutes ago. Darn lousey timing. (PS as for my apparent inability to tell my right from my left in the original post, what can I say? We'll keep it simple: on side work, other side no work).

on the plus side, you couldn't ask for better service than you'll get from bryston if something is wrong. my former amp was a 4b and it did indeed have a problem. shipped and fixed in a jiffy, and all i had to pay was one way shipping to vermont.

I own a Bryston 4B-ST, and have a couple of suggestions for you:
1. Check the switch on the rear panel for the "Bridged/Individual" mode to be sure that you have not accidentally set it to "bridged" (which would cause the amp to operate in only one channel).
2. Check the fuses (under the panel next to the power cord connection).
3. If neither of the two steps above result in a "fix", then send an E-mail to James Tanner at Bryston. Go to Bryston's home page (www.bryston.ca), and at the bottom of the home page there is a link for technical questions. Tanner is terrific about providing fast answers to E-mails he receives.

If your amp does have an actual electrical problem, you can remove the non-functioning amplifier module for the dead channel and send only that module to Bryston for replacement or repair. Bryston will sometimes send you the replacement immediately while the module from your amp is in transit to Bryston's U.S. repair facility (in Vermont, as I recall).

Sounds like a plan. Many thanks. The thing's not set to bridged (yes, it was the first thing I checked, all the while asking myself how, sitting in a room by itself, it could have switched itself to bridged but checking it none the less). I'll have to have a gander at those fuses when I get home. I've corresponded with James Tanner before and there's no doubt about it, he's one of the good ones.