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Horizontal lines on NEC plasma

I have an NEC 42 inch plasma. 2 days ago horizontal lines have been travelling upwards on the screen. Any idea how this has been caused or how I can fix this? Thank you

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  • 4 more comments 
  • TASSEL15 Jan 05, 2009

    HORIZONTAL LINES ON MY FLAT SCREEN TV.

  • larry_avena Jan 23, 2009

    picture normal for 1hr then afterwards the picture getting red every 15mins and with vertical line in the middle of the screen



  • brad1446 Feb 02, 2009

    I have a Harsper Plasma 4200 PDP Monitor and the screen is really fuzzy. Is there a cure this? I just bought a few years back.

  • Anonymous Feb 19, 2009

    I have a Samsung HPT4254 720P 42 Inch Plasma HDTV thats NEW! but out of warrenty. When i turn it on i get white and black horizontal lines all over the screen. Samsung said they couldnt help me i was like wtf you mean you cant help me. Give me back my 1,200 then A HOLE! :0

  • Shwmesumsk1n Feb 19, 2009

    I have a Samsung HPT4254 720P 42 Inch Plasma HDTV That is NEW! Had it for about barly a year. And no warrenty.It turns on and the sound works. But it has white and black Horizontal lines all over the screen and thats all you see. I called Samsung and they said they couldnt help me. I said well give me back my 1,200 back then A HOLE! :0 I will never buy a samsung product again.

  • pcpilot May 10, 2009

    Yes, I have a Sharp 32", I have vertical colors travling on my screen. It now takes, 20 minuts, befor I get a picture working. It"s a little over a year old.

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  • 244 Answers

Intermittent horizontal deflection
Resoldered the pins of horizontal deflection transformer
Picture is horizontally narrowed and deformed
Capacitor C2913 (390nF, 250V) on the deflector PCB had lost capacity
Geometric distortion, Pillow, and picture enlarged horizontaly
The problem was a short from GND to pin 11 inside IC301 (TDA8350Q). This pin is the output of amplifier for geometric correction signal. Replace IC301

Posted on Nov 26, 2007

  • Cheater Cheater Nov 26, 2007

    You rate me Helpful maybe the preparation was not meet your requirements to troubleshoot your problem It is possible not to give up everything I think you need warm up to pickup everything under sun.
    Just follow my advice to look for an expert to settle down your problem. I hope you can find a good technician to replace the given tips to prove my expertise does not good enough information I give but it just too simple to follow rules.

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Posted on Jan 02, 2017

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Hi have a samsung 42 inch plasma, all of a sudden it has a band 20cm wide of dotted lines going across the whole screen, some channels or when playstation in use the band gets wider, does not seem to...


if the band is horizontal your tv has bad y-buffer board. Usually there are 2 buffer boards- top and bottom. if the problem is in the top half of the screen replace the top board, otherwise replace bottom board.
but better to replace both a the same time.

if the tv has a vertical lines from top to bottom it may have bad plasma panel and can be considered as not economical to repair.

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If you wish to get some details; visit the site linked here. Pull up older posts.
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Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts

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