Question about LG 50PC3D 50 in. Plasma Television

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I have LG 50PC3D-UD display issue. I'm getting a black screen with thousands of blue pixels in center of screen. 5-6 inches wide orange horizontal from top to bottom moving across the screen. I check and test all A/V connection, hdmi, svideo, pc input, all same issue but sound work fine. I open the back cover and found 9 caps blown on the power board and replaced them and still no change. I spent $230 for new power board, still no change. I had 3 service tech out. Cause I wanted to be sure due to part cost. First one try replacing the power supply board, no change, and say the control board need to be replace. 2nd guy try the power board, no change, and say the Main board need to be replace. 3rd guy try the same power board, and have no clue to solve the issue, he said he called LG and they say to replace the Main board. I just want to make sure this will fix it due to the expensive Main board. Can anyone solve this? Is it the Control board or the Main board?

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The reason the blue pixels are igniting is caused by the driver board, not the power supply or main board. The drivers are part of the LG screen and cannot be replaced.

Posted on Mar 08, 2017

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: replace main board on LG 42LC7D-UB

not sure what you're referring to as a "main board", but heres the LCD Control Board for the TV

http://cgi.ebay.com/LG-42LC7D-UB-LCD-CONTROL-BOARD-6870C-0119A_W0QQitemZ150277759127QQcmdZViewItem

Posted on Mar 13, 2009

dsacco86
  • 1077 Answers

SOURCE: replace main board on LG 42LC7D-UB

Try this place, http://www.shopjimmy.com/catalogsearch/result/index/?q=42lc7d-ub&p=2

I the best place I know of to get parts at a good price.
There are a couple of boards that have different part numbers. You'll have to match the part# with yours. It maybe out of stock, but click on it. Then click on "find other products with this part number". Then all the main boards show up with that part number. A couple of them should be should be in stock.

Posted on Apr 17, 2009

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SOURCE: LG TV NOT TURN ON

To let you know , there jave been may claims against this 42" model There were some models released that had faulty power boards and video controller boards. LG recalled many of these to have them replaced

No picture and sound is Y +Z Sustainer problem.However, normally they have to change both Y Sus and Z Sus boards atthe same time. If you lucky than it's just a fuse on the Y sustainerblown (the chance is very rare) otherwise the IPM (Intelligence PowerModule) on the Y/X sustainer board is short. This is a common problemand costly to repair.
Is it under warranty or Extended 5 year warranty? If so get it repaired now.

Call customer service for help 877-543-8325 to try them first

If you are skilled in electronics the cost of parts is about $250 online (Otherwise add another $400 for labour and travel if you use a tech ) Always ask for a quote first))
Just ensure you select the right model as i am unsure this link is correct one. But the place itself should have your model
http://www.electronica-usa.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=EU&Product_Code=6871VSNB03E&Category_Code=PLA

Please rate our help to =keep the FREE service online++++Thanks for using FIXYA

Posted on Sep 14, 2009

  • 1 Answer

SOURCE: LG 42PX4MVH PLASMA TV - Sound but no picture.

I have the same issue with my LG 42PC3DVA and I narrowed it down to the Y SUS board. After a little research there are a few items that are prone to go. The ceramic fuses (as you found), sometimes the capacitors on the Y SUS, Z SUS, and power supply go along with them You can tell because thy will be bulged at the top instead of flat. I replaced a few of my capacitors - they are only $0.89 each so it was MUCH cheaper than a board.

The other thing that is common on the Y SUS in particular are the FETs (also called MOSFET). They can be replaced if you are good with a soldering gun but they are static sensitive so be grounded. They are also a bit tricky to test so you may want to do some research on how to determine if this is the issue... or you can just replace the whole board.

Posted on Oct 28, 2009

  • 458 Answers

SOURCE: i have a 42

The fuse you have replaced would have been on the sustain board, now that it clicks indicates a problem either with the control board or the sustain board. You would need to disconnect the connector from the power board to the Y-sustain board (left of power board) to check if the Vs & Va voltages are present, if so then the power supply will be working ok & the problem will be with the previously mention boards. There is the possibility that the plasma display screen could also be faulty.

Posted on Nov 06, 2009

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