Defective HDMI circuit board?
I have a Panasonic Viera TC-L42U25 and we get a random audio problem with HDMI connected devices. The audio will become distorted with a weird reverb effect.
We started experiencing this when watching our Roku and I switched HDMI ports, but that did not help. I later replaced the HDMI cable and that didn't help. The only thing I've found that fixes it is going to Roku settings and switching the video mode from 720 to 1080 (or vice versa), so I figured the problem is with my Roku. Then on a rare day that we used our DVD player it happened. In this case, I was able to fix it by ejecting the disc and reinserting it. We also have a WII console connected via RCA and there is no such audio problem. It also never happens when watching regular television through coaxial cable.
So, it seems to have something to do with the HDMI signal. Since both ports give the same results, does the circuit board need to be replaced? If so, is it something I can do myself?