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This might be a dumb question, but do you have HD Service with Comcast? It will only display in HD if you have HD Service with your cable provider.
Sorry, there was a problem. Please try again later.I think I follow what you've done. We have Time Warner / Spectrum in our area, but I think it all works the same. I have a couple of TVs with just a coax running into the TV and you will NOT get HD quality on most of your normal cable channels (think ESPN, CNN, HGTV, Discovery, etc.) if you are not using a cable box. In my case, I can get full HD on my local ABC, NBC, CBS, and Fox local affiliate channels (they are channels 4.1, 6.1, 10.1, 28.1 - note the decimal number) because they broadcast in HD in the local area and that content is carried via the coax connection. In order to get HD on all of your normal cable channels (ESPN, CNN, HGTV, Discovery, etc.) if you are not using something like Roku, you need a cable box to supply the HD signal to your TV. So for your local HD channels over coax, be sure you run the function under the setup menu for "discovering" the channels. You should then see some that are decimal numbers like I noted above. You should see HD quality on those channels. On my TVs I selected those as "Favorites" and access them quickly via the "Favorite" button on the remote. Makes it quick and easy to access your HD channels. If you are using a Roku TV, then you can look to see if Comcast has a Roku app (Time Warner has one) that will also allow you to see HD quality programming without a box.
Sorry, there was a problem. Please try again later.this set is only 720p so even though it is hdtv it is of lower resolution and the picture will be lacking some clarity.
Sorry, there was a problem. Please try again later.Mine is a little blurry to, so I just decided to deal with it, sorry I couldn't answer your question.
Sorry, there was a problem. Please try again later.I would try to use an HDMI connector from your Comcast box to your TV. I don't know if you'll get a better signal than using the coax or not but a coax cable is basically a signal carrying wire with a braided shield/ground around it. It's still susceptible to signal loss and interference. I suspect an HDMI cable is the better choice. Also, make sure you're viewing an HD channel. My local cable company broadcasts regular broadcast quality and I don't get HD on this TV unless I'm either watching a DVD/BluRay, or streaming video via my internet connection. When I do this, my picture quality is amazing. I hope this helps.
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