I'm having a weird issue with my AVR-889. A while back the front left channel on the receiver appeared to have died. I swapped speakers, swapped cables, and every time the left channel wouldn't work.
I have an extended service plan through Future Shop, so I took it there and explained the troubleshooting steps I'd gone through. They took the receiver and sent it away to be fixed.
A month later (!) it comes back with a note from the service depot saying it works properly. I go in and they demo it for me in the store. Sure enough, the front left channel works.
I take it home and put it back in my entertainment system. Everything seems to be fine until later on in the evening I power everything up, and guess what? No front left channel. I check multiple sources, multiple inputs, and nothing is being output to the front left channel.
Before I start tearing the system apart to test cables and speakers again, I think "Hey, let's see if Test Tone generates an output to the left speaker." I run a test tone, and static comes out of the front left speaker just like it's supposed to. But here's the weird part: now everything else works too. I go back to the show I was watching, and I'm getting sound from the front left speaker now.
So now I'm wondering if it's repeatable. I power the system off, and then turn everything back on. No front left channel. I run a test tone, and then everything works again.
I'm officially stumped. Has anyone ever seen anything like this before? Any information would be great before I go back to Future Shop tomorrow.