Two non-hidef get 50+ channels on antenna scan. The Vizio gets about 15. I can't get two local channels we want. Vizio said that since their tv is hidef, it needs stronger signal than the older tvs.

SOURCE: tv coax f connecter is broke off cannot hook cable cord on it. or antenna

I looked up the manual for this TV and it has composite (RED, WHITE, YELLOW) and component (RED, GREEN, BLUE) connectors as well.

Are you using a cable or Dish box? If so, those boxes usually have output in Coax, Composite, and Component formats. You could just run that type of cable. If you use Component you will also need another cable set (RED, WHITE) for audio.

If, on the other hand, you do not have a cable box and you are using your TV's tuner you only have two options. You can repair the broken connector or you can route the Coax through an inexpensive VCR which will allow you to convert it to Composite cables. In this case, however, you'll have to use the tuner in the VCR, not the tuner in the TV to change the channel. Sorry it's not the best of news.

I want you to know that I'm not paid for this. It's a strange hobby I know, but I like to help when I can. While I cannot physically repair you TV, I hope you've found this information at least helpful and will rate it positively. If you have more questions please don't hesitate to ask. Thanks, and good luck.

SOURCE: Vizio Sound Problem

I've seen the same problem, went thought a couple of cable boxes. Turned out to be an AC line problem. Try plugging the TV into a different out, maybe in another part of the house.

SOURCE: Vizio 42'' LCD having intermittent fuzzy screen on stdrd channels

you might have an overheating problem- make sure you have adequate ventilation around your tv

SOURCE: 50" Vizio Plasma reads "No Signal" on all inputs?

Well, your TV is still under warranty. That's the good part.
The only thing I can recommend without voiding the warranty is leaving the TV unplugged for 30min. That way, the TV can reset itself and hopefully correct the problem.

If that doesn't solve the problem, it's time to use the VIZIO warranty.
Here's contact info if you need it.

Technical Support
Toll-Free: 877.698.4946
(877 MY V I Z I O)
Technical Assistance Emails:
[email protected]
Customer Service
Toll-Free:888.849.4623
(888 VIZIO CE)

SOURCE: Buzzing noise coming from Vizio HD TV speakers

It ur Vizio tv,The power supply board is the problems.The transformers in the power supply board have gaps in the transformers.The high voltage curents flow that make that buzzing noise.