Question about LG 42PX5D 42 in. Plasma HDTV

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Red dots on my LG 42PX5D

I have red dots on the black on the top 1/3 of the screen. I have a monster surge guard AV800 and a monster HDMI 1000EX attached to a skyHD box.
The problem seems to be intermittent, but it does happen a lot, which makes me think it's some kind of interference, from an outside source possibly... but what? Where would I begin to find out if this is the case. Ofcom maybe?
Or if someone could shed any light on my issue I'd be very grateful, thank you.

Posted by on

  • ultravilet Jan 14, 2009

    Sorry I didn't understand that at all. Thanks anyway.

  • brijac Feb 27, 2009

    My 42PX5D has a simlar problem. On a no signal screen the bottom half shows a snowy red cloud also on very dark scene's the blacks have the same problem. If it is a dark still scene the red slowly decays over a few seconds and dissappears till there's movement and back it comes.
    Thanks for any help you can offer.



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Hello, you do not need to replace any of the sustain boards in your TV to fix the problem you are having. All you need to do is remove the back cover and make an adjustment to the Y sustain board. You will need to adjust the set_up & or the set_down! If you would like to do the adjustments to your TV please feel free to give me a call or message me. Ask for Dave! 1-503-432-9904 or message me @ You will need to remove the stand & the back cover. Then put the stand back on the TV so that you are able to set the TV in the up right position with the back cover off! Then you'll need to hook the TV up to a DVD player so that you are able to pause the picture while you are doing the adjustment to the Y sus! Do not adjust any other adjuster on the Y sus other then the SET_UP or the SET_DOWN. In order to identify the correct adjusters on the Ysus just look on the board and it should say SET_UP & SET_DOWN next to the correct adjusters. If you need more help please feel free to give me a call or message me!

Posted on Feb 08, 2009

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Y - sustain & z - sustain PCB's have adjustments to minimize
problem, but replacing boyh boards & then adjust is best......

Posted on Jan 13, 2009

  • Vista Electronics Jan 14, 2009

    Have a tech replace both sustain circuit boards........T.



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