Question about LG RU-42PX10 42 in. HD-Ready Plasma Television

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1" wide black bar appears on screen at turn-on for up to 4-hours

Recently my 50" LG plasma TV model DU-50PX10C (purchased in June 1995) started to have a 1" wide black bar extend half the screen from the top (just left of center) at turn-on and remains there for at first for 1-hour, now it takes about 4-hours for it to disappear. Picture is fine, just have to deal with the black bar. I contacted LG's Customer Service and they suggested I have a technician look at it. Before I incur that cost I wanted to know if there's a simple solution to my problem.

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Video board would bed the east solution replace it i have one out of working unit along with all other components i am willing to sell the screen on mine is brtoken but boards are all still good will sell call me 573-433-1925

Posted on Jun 03, 2009

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No! have a LG service center look at it.

Posted on Apr 15, 2009

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Half the screen is black and the other half is normal


Hello; I am John at J D Electronics in Poland, Maine. I have an LG TV that was donated to me. It is a plasma model DU-42PX12X. It had 1 inch wide red and green vertical bar on the right and a blue and yellow on the left. These bars appeared intermittently. pressing on the control board would make the bars go away. I have read many blogs on this problem and they all say to replace the control board located under that huge A / V input board ( held in by 4 screws on the large aluminum frame). The original part is # 6871QCH038A The replacement ends with a C instead of an A Aprox 90 to 135 dollars. This board is used on many different LG and Zenith models and is a HIGH failure rate part. I like to know WHY parts/boards fail and I found out why this board fails. There is a large square IC in middle of the board aprx 1 1/8 inch square. This type of IC is called BGA or Ball Grid Array. The solder connections cannot be seen , since they are under the IC . This IC was not properly soldered at the factory and that is why hundreds of these sets failed. I used my hot air soldering station on it's highest setting to heat up this IC . The IC must be directly heated from the top and some heat on the bottom of the PC Board. Liquid flux should applied to the 4 side edges of the IC prior to heating. The bars are now gone! To get to this board, remove all perimeter screws and all middle screws of the back cover. The A V board will hinge back to expose the control board if you unplug the cables to the side inputs and the one to the button board. The set will still run face down on a table with something to prop up the bottom screen so you can watch the bars. If the set was run for a long time with the bars, there will be some darkening where the bars have " burned" the screen. This is perminent, but usually acceptable.

PS The black screen on one side is also related to a bad control board ! John

Dec 09, 2010 | LG DU-42PX12XC 42 in. Plasma HDTV

1 Answer

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1 Answer

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Jan 13, 2008 | LG DU-50PX10 50 in. Plasma HDTV

2 Answers

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