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Re: bad picture on some channels
Hi, Sounds like the splitter that allows the cable to go to other tvs might have a problem or there is an old filter somewhere that needs to be removed. Check the splitters and make sure they are the right type and you don't have one that says "in" and out to UHF of VHF but tv 1 tv 2 ect and that if it says anything about band like 800 or 900. If you need further help let me know what these splitters have printed on them. Good Luck!
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Mar 10, 2015 - If you are connecting your cable or satellite box using an HDMI cordyou will ... You just need to change the input of your TV then scan for channels. ... Except the Vizio TV will not receive a channel that all the other TVs get.
When you are auto tuning the system will not store a channel which is week by its standard ( at least 60% signal strength ) This done to avoid grainy picture and hissy sound. You can go into manual tuning and store it.
Cocast may have only transmitting NTSC Ch 2~13 only for your area, to get more channel you may have to use Comcast cable box, I am in bay area, I can get 2~35 for basic plus service, I can get 2~13 for the most simple service for less money. What is your serivce level you are paying for?
Your TV also anly has NTSC tuner, there is no QAM or ATSC turner.
TV SPEC; http://reviews.cnet.com/flat-panel-tvs/proscan-26lb30qd/4507-6482_7-33403393.html
You may have to call Comcast.
You could try moving it to the other room to see if the connection is bad. Better than taking to the store just yet. If the picture is still bad at both connections I would just bite the bullet and take it back and exchange it while its free. Hope this helps and let me know if you need more ideas.
If you use a top of set box this may be the problem. The tuner in the set could be bad but that don't happen very often. Some place you have a cable splitter that can go bad. Try anothe set on that cable line if it works ok then it is the set
Depending on your cable provider, some of the HD channels may be present. If so, these are ususally located in the upper channel numbers. It sounds like you are receiving some of the HD lineup. A cable box will probably allow you to view more HD channels including the premium HD channels if you subscribe to them.
You should not be noticing a delay with the HD channels only. If this is what you are experiencing without a cable box, then it would be an issue with the HD tuner built into your TV set. LG customer service can let you know if there are any software updates available for yourmodel that can resolve this. Additionally, if you are getting your sound from an Home Theater system then you will notice an echo if using the TV's built in speakers at the same time. This is sometimes mistaken as an audio delay. If you are using a home theater system, be sure to disable the speakers that are built into your system.
In order to receive true high definition television, you will need a high definition cable box. Basic channels are going to look more grainy and not as clear overall even with an HD box, however you won't be able to view or decode the actual HD channels without a box.
In addtion, what type of cables are you using to hook up your existing box? This can have a substantial impact on the picture you see.
I had the exact same problem on a brand new Insignia 26 " LCD with DVD. Comcast tech was able to fix it by changing the Comcast box diagnostics. Here is what he did. Using the Comcast remote with the TV on - press power, cable, menu in that order. A comcast diagnostic srceen will appear. Select Additional HDMI options, then audio options. Change the audio options to L-PCM. Press power again to exit the diagnostics. That will fix it and you get to use the HDMI cable.