Damage to my TV screen from converter box?
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Damage to my TV screen from converter box?


This is a discussion on Damage to my TV screen from converter box? within the Converter Boxes and ATSC Tuners forums, part of the Over-the-Air (Antenna TV) category.

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  1. #1
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    Damage to my TV screen from converter box?

    How do I get rid of the bold black lines at the top and bottom of some of the channels on my tv? It is already hooked upto a converter box and the reception is great but as I said some have the lines. I have been told this may damage my tv screen.

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  3. #2
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    Quote Originally Posted by Boxeo View Post
    How do I get rid of the bold black lines at the top and bottom of some of the channels on my tv? It is already hooked upto a converter box and the reception is great but as I said some have the lines. I have been told this may damage my tv screen.
    I think you're referring to the letterboxing. You will sometimes see black at the top/bottom of the screen. If this is what you're asking, it is totally normal and will not effect your TV set. The following link gives a detailed answer.

    Letterbox - Wikipedia, the free encyclopedia

  4. #3
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    sometimes the box won't allow you to get rid of them and say 'aspect ratio cannot be changed on this channel' and if you are using a 4:3 standard TV, you can set the box to 16:9 widescreen and try zoom again, and it works.

    Same if you have a 16:9 widescreen with the same problem, set the box for 4:3 standard and zoom again. for some reason boxes won't zoom an existing 4:3 broadcast if you're currently set at 4:3 or vice versa for widescreen. why i do not know.

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    Boxeo,

    I think the answers above are correct but one other possibility is something called "Teletext". Here is a website article that explains it.

    Jim
    ----------------------------------------------------------
    "How to get rid of that pesky black box (Teletext)"

    Plugged In: the DTV Switch : Get rid of that pesky black box!

  6. #5
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    Some broadcasters have been sending a flag called AFD (Active Format Descriptor) which controls the aspect ratio on your converter box. So they are forcing you to view a show in letterbox even if you don't want to because they want you to see it in letterbox.

    So that's why your "zoom" button will sometimes not work.

    NAB: NBC Universal's AFD Technology | Broadcasting & Cable

  7. #6
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    My Magnavox converter box Model# TB100MW9 doesn't allow any channel that has the aspect ratio set to 4:3 to be zoomed out. So if a channel that has 4:3 aspect ratio and the show is widescreen, you're forced to see the top & bottom black bars (Letterbox). If a channel has the aspect ratio set to 16:9 (usually HD channels, but WYIN has their main & secondary HD channel in 16:9 & 2 SD subchannels in 16:9), then any widescreen program can be zoomed to fill the screen. If the program on an HD channel was filmed in SD, then it shows the letterboxing. If you zoom the program, then it'll fill the screen. Now on the same HD channel showing an SD channel, if you set it to fullscreen, then it fill the top & bottom, but the left & right sides of the screen now have the black bars. Only problem with that is that it makes people look skinny.

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    Quote Originally Posted by dave73 View Post
    My Magnavox converter box Model# TB100MW9 doesn't allow any channel that has the aspect ratio set to 4:3 to be zoomed out. So if a channel that has 4:3 aspect ratio and the show is widescreen, you're forced to see the top & bottom black bars (Letterbox). If a channel has the aspect ratio set to 16:9 (usually HD channels, but WYIN has their main & secondary HD channel in 16:9 & 2 SD subchannels in 16:9), then any widescreen program can be zoomed to fill the screen. If the program on an HD channel was filmed in SD, then it shows the letterboxing. If you zoom the program, then it'll fill the screen. Now on the same HD channel showing an SD channel, if you set it to fullscreen, then it fill the top & bottom, but the left & right sides of the screen now have the black bars. Only problem with that is that it makes people look skinny.
    Okay, I'm confused now! Multiply that by the number of different converter boxes, and not to mention tv sets all handle it differently... What a nightmare!

  9. #8
    Maggie
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    Coverter damaging my tv

    6 months after having the cable co's converter box installed, the tv screen went completely black with the exception of a 1/4" space across the center off the screen. It started with the black areas above & below. 1st 2", then 3" then 4" then all of it. Today, another tv suffered the same fate. However according to the cable co - it cant be their converter causing the problem. So this is the 2nd tv being thrown out. I guess they will get their way in that you have to buy the latest & greatest tv. Pissed off (can you tell?) but glad to know mine isnt the only one with this problem. Good luck.

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    It ain't the 'converter box'. Look elsewhere for the culprit.

    If these are old CRT tube sets, the vertical amplifiers failed. A not uncommon failure mode.
    Fringe Reception and RF Steve like this.

  11. #10
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    Quote Originally Posted by Maggie View Post
    6 months after having the cable co's converter box installed, the tv screen went completely black with the exception of a 1/4" space across the center off the screen. It started with the black areas above & below. 1st 2", then 3" then 4" then all of it. Today, another tv suffered the same fate. However according to the cable co - it cant be their converter causing the problem. So this is the 2nd tv being thrown out. I guess they will get their way in that you have to buy the latest & greatest tv. Pissed off (can you tell?) but glad to know mine isnt the only one with this problem. Good luck.
    I can't see why the cable company would want to force you to buy a new TV, they don't make any money from you buying a new TV. They don't care what you watch on, they just want you to keep paying them.

    Old TV sets die. All analog TV sets are over 5 years old now, with most being over 10 years old. How long do you think an old TV lasts?


    This is an antique TV.

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    I still have the 20 inch CRT I bought with my lawn mowing money in 1989... It has survived numerous moves, being dropped, several children, and all the latest in gaming technology the late 1980s and early 1990s had to offer! I still remember refusing to buy the "extended warranty" in 1989 to save 40 bucks and the sales person telling me that I was making a mistake
    In 2014, we use it for the kids to watch movies on DVD and VHS (yes, we still have about 300 kids shows on VHS)....
    THe darned thing is heavy though! And nothing like the antique TV you just posted!!!
    MrPogi likes this.
    Some "How To's" for those who need help streaming content:
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    Quote Originally Posted by MrPogi View Post

    This is an antique TV.
    Man, that looks exactly like the TV my dad had for 10 years till he passed away. Magnavox, right?

  14. #13
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    Quote Originally Posted by CaliTVguy View Post
    I still have the 20 inch CRT I bought with my lawn mowing money in 1989... It has survived numerous moves, being dropped, several children, and all the latest in gaming technology the late 1980s and early 1990s had to offer! I still remember refusing to buy the "extended warranty" in 1989 to save 40 bucks and the sales person telling me that I was making a mistake
    In 2014, we use it for the kids to watch movies on DVD and VHS (yes, we still have about 300 kids shows on VHS)....
    THe darned thing is heavy though! And nothing like the antique TV you just posted!!!
    I have 2 CRT TV sets one 24" and one 27". We only have them because they were free, they have DVD/VCR built in, and one is in the spare room and the other in the garage. Yes, they would make great boat anchors. If the cable guy came to my house and shot them, I wouldn't be upset.

    The point is, there isn't an analog CRT TV anywhere that owes anyone anything.

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