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How come my old tv tunes all channels but my hdtv tunes none.

06-08-2010, 08:34 AM
Ok, I subscribe to comcast basic cable. You know-channels 2-99 on a wire. I have an upstairs tv that is an old Sony 32" Trinitron color tv. I plugged a single coax in and received all channels 2-99. Then, my Toshiba 34" HDTV CinemaSeries won't tune into any channels like my sony . Now ive read that some tvs have atsc and qam and tuners of that kind and some dont. I just dont get how some sony trinitron color tv can tune into all the channels, but my hdtv says it requires a cable box on the setup page. If I just buy a cable box off ebay, oviously it wont work. Ive also done some research and it seems comcast is slowly tranisitioning into TOTAL digital requiring cable boxes for all tv sets in ur home. I dont wanna pay for a cable box just for tuning into about 70 available channels. I also know around the nation there are a variety of transitions happening. All i know is that the total transistion hasnt happened in my area yet and tvs can recieve basic cable (CH 2-99), with a single RG6. So, bottomline is, do i need a cable box or tuner, or what?

06-08-2010, 08:48 AM
Hmmm, that is kinda strange. The only things that come to mind are:

1. You only get analog cable/channels. So your older SD has a analog NTSC tuner and your new HD TV has digital tuners only (ATSC/QAM). But I would think Comcast in Nashville would be digital by now, so don't think that is the case.

2. Your not scanning for both analog and digital channels when doing you cable scan on your new TV. At the very least you should get your local channels if digital is avaliable.

3. The connection to the TV is not correct that your new TV is not getting a proper signal and or the tuners in your TV are defective.


06-08-2010, 10:58 AM
Yes. I'm thinking that you have not set your TV to tune analog channels. If we had the model # of your TV, we could give more precise advice. However, your best bet is to read your owner's manual. No doubt it will answer your question and give you a solution.

06-08-2010, 11:45 AM
For more info the model number is: 34hfx83

I googled this and I went to the CNET link and the Toshiba website for a review of the specs. IT showed up that this tv has a NTSC tuner, but not the newer tuners (ATSC/QAM).

My old tv (Sony Trinitron 32" Color TV) says it has a 2Tuner functionality built in. Now I dont know if ATSC existed back then but it gets all the channels fine in standard definition.

As for the Toshiba HDTV with the model number 34hfx83---It gets all the channels fuzzy, and it gives me the option to connect using a cable box or not, and when I plug in the RG6, I get fuzzy channels. I tested the wire on a nother tv and the wiring seems fine. The Toshiba seems like it doesnt have a ATSC or QAM tuner at all.

From here i donno wat else to try besides gettin a cable box, which is dumb just for channels 2-99.

06-08-2010, 12:56 PM
Some TVs require telling it (in the menus) that you are using cable as opposed to an antenna for the analog channels. If the TV is set for an antenna (default usually) then the cable channels will not tune correctly.

You could try a VCR as a cable box. The best solution would be to get a HD cable box though.

06-08-2010, 01:01 PM
That TV has two (2) coax Inputs (and one Output)-- have you tried BOTH?

You're right about something not working properly; you should not be getting "fuzzy" results. Be sure you select the same (Ant) Input that you connected the cable to . . . see Page 23 of the Owners' Manual

06-08-2010, 02:20 PM
Ok guys. I went to the appendix of the manual. Their is a spec sheet and everything. I found that it is a NTSC tuner. (should've known from common sense.), and it tells me a variety of signals it can take from cable signals.

I always connect to ANT1, like it tells me too. I set the mode to cable, and then CH program it. So, it goes on, and at the end, I only have like 4 clear channels. And the wire is perfectly fine.

On my remote, there is a mode selection as follows:

Also I remember I used to subscribe to cable tv from comcast 5 years ago. I cut it off and resubbed since 2 years ago. When I first had it with this TV, everything was fine. I found that you can try setting the remote control input on cable also to make the tv accept cable signals. Now Im at work and when i get home i can try this.

Here is some info i picked up from the manual. See if anyone understands.

Channel Coverage:
Cable TV: Mid Band: A-8 through A-1, A through I
Super Band: J through W
Hyper Band: AA through ZZ, AAA, BBB
Ultra Band: 65 through 94, 100 through 125

Thanks for taking the time~!!

06-09-2010, 10:05 AM
OK guys. I tried everything. From different inputs (ANT1 and ANT 2), to setting the remote control input to cable. (But it turned out that part was only for controlling a cable box) (Which I currently don't have.)

It turns out I remember the TV i first had before i bought this Toshiba "HDTV" and it was a different one so Ill be needing a tuner box of some sort in order to get cable with this TV. I hate this Toshiba HDTV. My dad had bought it back in 2004 or 2003, ( I cant quite remember), and I think thats the reason why a good tuner hasnt been implemented in this.

06-09-2010, 10:27 AM
Yea, if it is from 2004, it probably is just HD ready as many TV's did not make digial tuners (ATSC) standard until 2005 or after. QAM tuners for digital cable was not a standard until a few yeas after that on many models. But it does not make sense as it appears you are getting analog cable anyway since your other TV (Sony CRT) with a NTSC tuner only is getting many channels. Did you check to see (with the other TV) if that line is giving a good signal? Since that Toshiba is HD, you may just want to bite the bullet and get a HD box and service anyway to take full advantage.

Comcrap in the Chicago area has been digital for a while. They recently made getting a STB the only way to get service even if you have a QAM tuner as all you get now are locals. Looking to get the $$$ for STB fees and root out the freebie cable pirates I guess. Don't think the same thing is happning to you since you are still grabbing analog cable. :what::what:

06-09-2010, 10:43 AM
The line is fine. I even checked using our samsung 20" LCD tv. So it comes down to a HD box. Also, my sony CRT tv has a 2Tuner function if that helps. Its time to get a hdbox.

06-09-2010, 04:26 PM
The line is fine. I even checked using our samsung 20" LCD tv. So it comes down to a HD box. Also, my sony CRT tv has a 2Tuner function if that helps. Its time to get a hdbox.

The 2 tuners in your Sony are NTSC tuners that support the picture-in-picture function of the TV.

06-10-2010, 07:41 AM
One thing I can tell you is im still getting digital comcrap 200 channels I was suppost to be losing it may 31st. I would suggest rescanning for those who have lost it.

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