Question about LG 50PX1D 50 in. Plasma Television

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LG 50PX1D Plasma TV with dark and fuzzy picture

I have an LG 50PX1D Plasma TV. The sound work fine however the picture is dark and fuzzy. Please advise what I can do to repair it. Thank you for your help

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Z-Sustain PCB will cure it.

It is inside the TV, on the Right Hand Side.

www.chsinteractive.co.uk or Google for a replacement.

Posted on Sep 08, 2009

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Posted on Jan 02, 2017

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I have a LG 50PX1D 50 in. Plasma Television. it turns on and stays my sounds or working fine. but no picture.. i have checked the power board and the capacitors are ok, and the fans are working @ normal...


You need to replace both the Y and X-sustain boards to light the tv. If the voltage is fine from the power supply then those are the only other boards related to lighting the plasma gas.


Thank you!

Jul 07, 2011 | LG 50PX1D 50 in. Plasma Television

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As I was watching TV last night, my 50" LG Plasma TV 50PX1D, and it made 3 loud "popping" sound, and you can barely see the images. The picture is not jumping & the color doesn't appear to be fading in...


Either X,Y, or Z-boards seem to have developed a problem, when this happens it results in a 'sound-no-picture' condition. If its under warranty take it back, if not have your local tv repair center fix it for you....

Oct 18, 2009 | LG 50PX1D 50 in. Plasma Television

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Hi you need the y-sus board. You May find it @ partstore.com Thanks.

Sep 21, 2009 | LG 50PX1D 50 in. Plasma Television

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Any info on picture problems with LG 50PX1D-UC Plasma? The picture is slighly fuzzy and seems to pulse in brightness


Your TV is going to need a Z-Sustain PCB.

The Z-Sustain controls the contrast of the image, it is also a common part to fail.

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If you paid by cheque or credit card, that is your proof of purchase.

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Most likely what happened is one of the capacitors went bad. When a capacitors goes bad it produces a popping sound. This could be an easy and cheap fix if you find the bad capacitor or capacitors. The bad capacitor will have a bulging top most likely on the power board but could be anywhere.

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Hi , I recently had the same problem which I was determined to fix . So I did a few weeks of research to find that it was the Y SUS board which burns out. I'm sure you realized that the TV gets hot. Personally I think this is why. circuit boards don't like heat and I've learned that the cooling fans are a joke. I replaced the board and got my picture back. I proved the fan theory because after the screen started to act up. I placed a cooling fan near the vent holes on top and the problem cleared right up,It also helps if you lower the brightness which helps out on the heat situation.I will soon be adding a fan with a temp. sensor. This shoud help if your screen has lines when you initially turn the cool TV on.then I have Some other costless solutions. Hope this helped these are great TV's and like our cars we maintain them not throw them away..................................Mr Wiseman

Sep 16, 2008 | LG 50PX1D 50 in. Plasma Television

1 Answer

Picture went dark


This problem can be a bad YSUS or bad ZSUS and I recommend replacing both. The part #s are 6871QYH039B and 6871QZH044C. These parts can be found at Andrews or Vance Baldwin.

May 29, 2008 | LG 50PX1D 50 in. Plasma Television

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