I just recently noticed that there is nothing going to the surround speakers. They are hooked to the surround left and surround right amplifier outputs. To test, I went to:
Menu -> Manual Setup -> Speaker Setup -> Channel Level
Made sure Test Tone was set to Manual, then did Test Tone Start
Front Left: working (going to external amp via preamp)
Center: working (powered from denon center amp output)
Front Right: working (going to external amp via preamp)
Surround Right: no sound (tried setting signal level all the way up to +12db)
Surround Left: no sound (same)
The surround speakers work. The connections are solid. It's possible that the wires have become severed, but I don't think this is likely since there are two dead at the same time (I might crawl under the house to verify this evening when it cools down). This same config used to work, though I do have a young child who loves to mash buttons (but this is normally locked cabinet, but remotes are still fair game), so it's possible this is some strange configuration problem, but I'm also wondering if I have some dead channels in the amp?
Anyone have any troubleshooting tips?
Oh, I also did a microprocessor reset, did not fix the problem.