I had an old Sony home theater in a box that was starting to go bad. A receiver with a small 5.1 speaker setup. The right channel died on me. So a friend gave me their old Denon AVR-2809CI but I'm having even more trouble with that. No sound.
The first thing I did before even plugging in the Denon power cord was to wire all the speakers and plug in the optical cable from our LG C6 TV. The TV was already set up to send audio out through the optical from when I had it hooked up to the Sony receiver. Then, when I turned the Denon receiver on, I did a factory reset right away.
I have the optical cable plugged into the TV/Cable optical input. For the input and source settings, I have HDMI set for none, and the audio input assigned to optical 1. But no sound is coming through.
Originally I was actually getting static with occasional snaps and pops. And every once in a great while, traces of static-filled audio from the actual source sneaking through. For that reason, I thought it might be a bad optical cable. But it did work fine with the Sony receiver.
I haven't tried hooking anything else up to it yet and don't have another optical cable to try. But to make sure it wasn't some kind of sound output problem to the speakers, I went into the Denon menu to run the speaker tone test.
Originally the speaker level tone test produced static coming through the center channel speaker for both the center channel tone test and oddly also for the subwoofer tone test. Nothing came through for any other channel.
So I tried messing around with the optical cable. Trying different inputs, different digital settings from Auto to DTS, to PCM, etc. Doing the same thing on the TV, changing the output settings from Auto to PCM, etc. the only thing that changed is that now when I run the speaker channel tone test, there is nothing from any channel at all. Occasionally a couple audio pops from the center channel speaker when I select the subwoofer test. But that's it.
The only "tricks" I could think of trying were blowing compressed air through the air vents to try to clean it out (there wasn't too much in there though) and shooting air into the headphone jack since I read that can be a problem. I've also triple checked all my connections. And tried multiple combinations of input settings. No changes.
There are two speaker patterns on the display panel. I assume the left side is detecting the channel inputs. And I assume the right side is detecting the audio channel output to the speakers. The left side looks correct so I assume everything is being detected properly. But the right side is weird. The left and right front channels are faded. I tried to attach a photo but can't figure out how to do it through my phone just yet.
Can anyone help me with any other tricks, anything silly I might have missed, or am I just out of luck? Thank you for any advice or suggestions.