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OnDemand issue: Wavy lines / frozen screen

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Kag56
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Contributor
Posts: 1
Registered: ‎08-10-2017

OnDemand issue: Wavy lines / frozen screen

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Hello!  Everytime we watch something OnDemand (whether paid or not), we are getting super annoying lines / frozen screens (see attached pic).  

 

I've reset everything at least 5 times this week.  The TV is also new and this never happens when watching normal TV- only OnDemand.  

 

Any thoughts?  Thank you!IMG_7073.JPG

 

 

Wavy line/previous frozen screen in the middleWavy line/previous frozen screen in the middle

 

 

4 REPLIES 4
CRobGauth
Platinum Contributor III Platinum Contributor III
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Posts: 7,978
Registered: ‎11-04-2008

Re: OnDemand issue: Wavy lines / frozen screen

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Does it happen on more than 1 TV (if you have more than one)?

What model STB do you have?


If a forum member gives an answer you like, give them the Kudos they deserve. If a member gives you the answer to your question, mark the answer as Accepted Solution so others can see the solution to the problem.
SueSage
Contributor
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Posts: 2
Registered: ‎08-11-2017

Re: OnDemand issue: Wavy lines / frozen screen

Message 3 of 5
(1,683 Views)

I am having the same difficulty. Was able to watch 2 Game of Thrones ON DEMAND but then when I went to watch the third one it was all pixelated and couldn't watch it. VERY annoying. I pay a fortune for services and now I can't view the show!!!

JLEinVA
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Posts: 1
Registered: ‎08-12-2017

Re: OnDemand issue: Wavy lines / frozen screen

Message 4 of 5
(1,636 Views)

We have also had recurring viewing problems with on-demand video play, usually late at night. Ours are lines across the whole screen like shredded paper along with distorted sound.

PaulKolodner
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Posts: 3
Registered: ‎11-22-2017

Re: OnDemand issue: Wavy lines / frozen screen

Message 5 of 5
(1,424 Views)

I'm posting the reply below wherever I see this problem because I think I have solved it.

 

I’m a physicist with long experience in electronics and optics, and I have solved this problem on two set-top boxes in my house.  I removed the coax cable between the wall jack and the set-top box and replaced it with one that was 3” shorter.  End of problem.  What??  Why should something so silly actually do anything?  Well, here’s what I think is going on:  The RF radiation that enters that cable can be weakly reflected from its ends.  If the wavelength of the particular channel has the correct relationship to the cable length, a resonance can be set up, just like blowing into a flute creates distinct tones.  This resonance can cause problems.  Changing the length of the cable by a quarter of a wavelength shifts it out of resonance.  The channels I had problems with use frequencies 727 MHz and 636 MHz.  (You can find this using Menu/Settings/System Information/Info in FiOS). The formula for the wavelength in this kind of coax cable is: wavelength in inches = 7793 / frequency in MHz.  This gave 7793/727 = 10.7 inches and 7793/636 =12.3 inches.  A quarter of those lengths is 3 to 4 inches.  I had a cable lying around that was about the right length – being off by an inch or two wouldn’t matter.  I got lucky the first time.   If this had not worked, I would have tried some other lengths within a wavelength of the original cable length.

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