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My tv has horizontal lines and displays no ref signal

There was "no" picture.. i replaced upper and lower bufferboards. the upper board had one burnt chip out of 8.. it now has picture upon power-up but has horizontal lines top to bottom and displays "no ref signal".after 40 secs or so it displays "power saving" and then shuts off. i suspect the y sustain board ???????

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  • Hitachi Master
  • 8,617 Answers

Yesthe sustain board should be replaced when the Buffers are replaced especially if the old buffer had a shrted drive IC as that usually damages the Y sus board also.

Posted on Dec 09, 2012

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6ya6ya
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Posted on Jan 02, 2017

  • 910 Answers

SOURCE: At first it was no

Have you replaced both the Y Driver & Y Sustain Boads?

Posted on Jul 19, 2011

jdvillanueva
  • 2098 Answers

SOURCE: Original problem, Working great when

Hi,

Yes, you should replaced the Y scan board. I saw your board on Shopjimmy.com but before you ordered it online, check the part no. of your board on the white sticker. Replaced also all filter electrolytic capacitors in the output of the power supply feeding the Y-sustain board.
Watch the video below for more info regarding electrolytic capacitor.



Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Posted on Sep 04, 2011

SD Tech
  • 14553 Answers

SOURCE: Panasonic TC-P42C2 Horizontal Lines in Picture

problem could also be inside the display panel.

Posted on Jun 08, 2012

  • 115 Answers

SOURCE: Hi, I'm working on a Philips 42PF7220A Plasma TV that came in dead. I replaced the y sustain board and now it has thin black horizontal lines 1/4

change x card to

Posted on Oct 09, 2012

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