Okay... but the meters can be connected to three different points in the channel signal path. By changing the meter point you can see where/if the signal is being lost.
Also, if i turn up the fader, I get sound coming out, but I'm unable to turn on the "on" buttons for each of those channels.
Clearly, that makes no sense.
The ON switches might be being controlled by a mute group, so check that out.
But if sound is coming out through a fader it's via a different route, so check fader linking too.
If you haven't already, it might be worth doing a full hardware reset:
Press and hold the [AUX 1] and [HOME] button in the Fader Mode section while turning on the power switch to commence the reset sequence. (All user data is lost).
Also, How did you guys link in those pictures like that? I couldn't figure that out. The video I watched didn't seem to have any sound on it.
Yes, the video is mute. To embed images you need a direct link to the image file (it should end .jpeg or .png) . Paste that link into the post here, with img (in square brackets at the front) and /img at the end (in square brackets also).