The issue has positively nothing to do with cable providers, satellite signals, Dish networks, or any of their corresponding boxes. Doesn?t concern HDMI cables, DVD players, Blu-Rays, or otherwise. I have two Vizios... one in the bedroom, the other in the living room. The one in the BR has this issue we?re discussing (despite this dated thread), and is split directly from the cable output in the LR, so it has no cable box, while it displays channels independently from its LR source. It only happens late at night, (but that?s also the only time of day it?s used). Doesn?t matter which channel... it randomly goes off the air (like in the old-school days after the National Anthem... think Poltergeist!), simultaneously becoming so loud with that white noise that accompanies a station having gone off the air. It scares the crap out of me (b/c I?m thinking Poltergeist!), then after about 2-3 seconds, the TV shuts itself off, then restarts, resuming its normal state. It seems to go through stages of happening almost nightly (once ea), to going a couple months without any occurrence. Doesn?t matter if the AC is running or not, otherwise, the only electricity running while I?m in bed are two night-lights, seasonally the ceiling fan, and the refrigerator?s cycle usage. Seemingly, no pattern.
The LR Vizio was purchased off the Walmart display floor, 3 yrs ago. From the get-go, the sound was fading in and out intolerably, via its factory or display floor setting (which I no longer recall). But after changing it, I never experienced any further problems. That being the third LR TV purchased within one month (the other two were brand new Samsungs... one had issues, the other shy of necessary requirements), I didn?t have the energy to fight Walmart a third time, esp regarding a very limited warranty, display floor TV. I DID have my head examined after purchasing three consecutive TVs from Walmart... a display model at that... and all the specialist could find, was that I had learned my lesson. And to be fair, I didn?t correlate any prospective issues with buying ANOTHER Vizio, to the issues I had with the first one, since the first one came from the display floor, and the second one I bought used from a friend, dirt-cheap. But this is my downfall for giving Vizio the benefit of the doubt (and relying upon my mate?s recommendation of the brand).
Last week, I fiddled with the sound settings on the LR TV/first purchased Vizio. A few days ago, it started to do the same thing the BR TV/second purchased Vizio does, in that it kept attempting to go off the air repeatedly within about a 2 hour span, while left on the same channel (not sure if any bearing to the issue...). It never succeeded fully, but you could hear it begin to do so with that loud, distinctive sound the other one makes...
Therefore, I now feel this issue is most probably sound-related, within the TVs themselves, and NOT related to any exterior equipment, connectors/cables, or signals, while especially after reading Salamonlu?s post (post #22), regarding this annoyance, which I have been investigating through my own experience, for 2 yrs now. I am going to change the sound settings on the BR TV now, to see if it has any impact for a resolution. NO more Vizios for me!