We hooked up our antenna cable to the HDTV input which should be the ASTC tuner. The proper menu comes up but when you try to go into the HDTV tab to get to the channel scan mode the screen just goes to all blue and it says "no signal". We should be able to get it set up without a converter box, at least that's what we thought when we bought it.
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You may be able to get around this via a digital hd tv decoder box and then have it on a hdmi input on the TV as a backup to the cable if you can't have both cable digital channels stored and aerial digital channels stored
You don't say what you are trying to input but take note that your model does not have a digital tuner on the DTV input. If you use a digital OTA antenna, the signal must first go through a digital converter or tuner before it goes into the DTV input. The DTV/ANT input is only cable ready. There is no digital tuner in the TV to activate the DTV menu.
Your cable system is probably QAM (digital cable). The tuners built into the TV are analog and digital OTA tuners (ATSC and NTSC). If you connect the Cablevision box to the component video input (and connect the audio out of the box to the appropriate audio in) on the TV and an appropriate antenna to the coax (antenna) input, you will be able to swap use the tuners in the TV. (See tvfool.com for antenna types and direction or antennaweb.org for directions of the most likely stations to be received at your location. antennaweb assumes an external antenna and is conservative in the list it provides.)
I hope this helps.
Cindy Wells (please note, you probably need to get the component video cables. These have 3 RCA plugs on each end (red, green and blue). To carry the audio you need a cable with 2 RCA plugs on each end (red and white). Match the colors as you connect them.)
Your TV is an "HD-Ready" television. What this means is that your TV is ready to accept HD input from an outside source, but doesn't have the ability to produce the content itself. It is a monitor and does not have a digital tuner. Without a digital tuner (or for cable a QAM tuner) you will not receive OTA broadcast HD.
You need to purchase a High Definition capable set-top converter box. The converter box will have HD component out and may have HDMI out, either will feed your HD Ready TV.
You will need to use a converter box if you want to receive digital signals from an antenna as the tuner is not the ASTC (HDTV) type. Once you get a converter or cable box you can come out of it with component video cables and go into one of the inputs in the back of the set.