Question about LG RU-42PX11 42 in. EDTV-Ready Plasma Television

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Hi, i have an LG plasma, model number RT-42PX11.

Hi, i have an LG plasma, model number RT-42PX11. It was working ok then in the space of a couple of hours the picture deteriorated to the point where there was no picture at all, just a dark grey haze, the sound was still working ok. I then disconnected the power for a moment, then reconnected, now it will not even turn on??

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Faulty and bulging capacitors in Power Supply Board. You can download Service Manual from the below website:
https://www.manualslib.com/manual/961738/Lg-Rt-42px11.html

Posted on May 17, 2017

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You need to pull the power supply out and replace the damaged caps on the board. Look for swollen, pushed up tops and leakage around the base of the caps.

You need soldering and basic electronics skills. You also need to pull apart that big tv and pull the power supply board!

You can look on Ebay for pullout boards from people who have broken their screens. It can get you a working board for cheap sometimes!

Good luck and be careful!

Posted on May 07, 2010

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Posted on Jan 02, 2017

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1 Answer

NO PICTURE ONLY LINES GOING ACROSS COULERD


the ysus board is the problem .this is the board on the left .check the conecting ribons first.normaly its the one that conected to digital board .

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LG part 6871QZH033A is what you most likely need.

There's a chance I might be wrong, of course.

But that would be my first guess.

There's a a guy having it REALLY cheap right now on eBay. I'd bit on it if I were you...starting price is like $10 and normal price is more like $70.

If it's not that then the second one is the YSUS board...he likely has that too.

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i think this plasma have a main power switch check that and see what happen if is turn on then u are ok now if it dont have power is the power supply

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Hi i bought LG plasma model no RT-42PX11 2 years


G'Day!

Unfortunately, what you're describing is a repair issue. You won't be able to address the problem with troubleshooting. There is a part inside the TV that needs to be replaced. If you're under warranty, this will cost you nothing. If you're not under warranty the cost will likely be a minimum of $200 parts and labor. However, be warned that the cost could be considerably higher.


I hope I've provided you useful assistance and that this information allows you to make an informed decision as to how to proceed from here. Please be sure to vote on my response. I hope I've earned a good rating from you today.

Please post a comment if you need additional assistance so that I can help you further.

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I just fixed my plasma with same looking problem. Mine is a 42PX11. Cost me $320.00 in parts from Fishwick Electonics. Replaced three circuit boards, crossed my fingers and turned it on and am happy to report it has been working fine since for about 6 months now.

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1 Answer

Color loss


Hi,

How old is your plasma?

I believe the gas that powers the plasma only has x-hour's life and therfor may need to go for repair in a tv repair shop

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