Channel info pixilated, distorted, HD works intermittently
I've had my Mits for about four years and recently the channel information is distorted to the point that it can not be read. Any suggestions on the cause?
Also, recently when I attempt to switch to HD, the set acts like it doesn't have an input. I've verified that the signal is entering the set but the set doesn't find HD or digital signals.
Thanks for any assistance
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The problem will be in the power amp for the the left channel. One you have identified this on the circuit board you can compare the channel with the right. As they are both the same. Start with a visual check. If anything looks odd compared with the the right replace it. Distortions are often caused by a burned resistor. Though the main power transistors or IC can cause it too. If you can't find anything visual I would replace the main output device(s) for the left channel.
I don't believe that it is cost effective. BUT, if you have Comcast, you will now need a cable box to watch most channels now. I believe they stop at about channel 12 without the box. It's their way to stop cable thieves, but it's an inconvenience for the rest of us.
If this isn't the case, you might want to try to contact Vizio tech support www.vizio.com. or try to reset the TV - unplug the TV, press and hold the power button for 30 seconds, repeat. Plug it back in and see if it helped.
Your TV is not at fault, it is showing you the difference between HD and non HD channels. HD TV's work great with HD scorces but don't usually look that great with standard definition, Also the non-HD channels are more likely to be heavily compressed which makes them look bad too.
Check all of your cables on the back of the tv and your sources such as Cable,Sat box and DVD palyer to make sure they are fully inserted into the input and output connectors. Some times Component cables will work loose and you end up with a missing color. Temprature changes can affect intermittant connections. If that does work then you have a bad Main bd.
Receivers like this will incorrectly decode rear channel audio and pass it on to the rear channels as distorted audio. Make sure the source being used really has rear channel information encoded into it. It could have other issues but check this first.