This is a bit of a stupid question I fear but I can't find anything authoritative and I'm out of ideas.
I just moved into a house with a wall mounted TV and in-wall HDMI to some built in cabinets. Plugging any device via cables into the HDMI wall plate in my cabinets doesn't produce a signal to the TV.
The system was working for the previous owner (who left the TV), plugging directly into that input on the TV works, and, what's weirder, plugging my Chromecast into the wall plate *does* work, though it's a bit snowy on the 70" Sharp.
Now, as the Chromecast is a dongle, it bypasses the cables I brought. I looked at the cable left behind by the previous owner connecting the TV and it's a high speed (1.4?). The cables I'm using on the cabinet side are cheap, several years old, and presumably not high speed.
My question is basically, is it possible that mixing from 1.3 at the device to 1.4 (presumably) in wall and up to the TV is causing problems? I have to imagine that's it, and picking up a couple 1.4 cables should do the trick?
Follow up question: I have a Denon e400 showing up on Monday. If I'm right about the cable mismatch, will it matter to the Denon if its inputs are 1.3 if I keep the 1.4 chain solid on the output side of things?
I'm extremely technical but not so much in the av world, so I'm not sure if this is totally insane, if I'm missing something obvious, or if mixing cable speeds is always idiotic.