Question about LG 42PC3D 42 in. Plasma Television
I have a 42" LG plasma TV (DU-42PY10X). The problem was 2 red vertical lines (strips about 1") and 1 green line on the right side from the front side view. A repairman from an authorized repair center changed one of PCB assembly (Part # 6871QLH037A, it?s left from the backside), however, there was no change. He determined that my problem is the panel. Five months later, all the left (from the front side) half screen turned black. The following site suggests a good solution to fix red strips, however, can it solve the half black screen? http://greenrenovation.wordpress.com/du-42px12x-red-stripe-repair/
The intermittent vertical strips can be caused by loose connections or defective control board or drive board. But if there is a single vertical line, it’s the panel defected.
Now you got left side black. I don’t think it is the panel. But you need to replace the control board and the left drive board (bottom right from back) to confirm. You can find the part# on the boards, like 6871XXXXXX. For the green line on your right, it won’t go away, even your replace these boards.
Posted on May 31, 2009
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Posted on May 30, 2009
The problem is in your LCD connector just re-connect your LCD connector. this happen due to vibration or shock. its a loose connection. trust me.
Posted on May 27, 2009
The problems you are experiencing is the panel matrix, that is the connecttions to all the pixels on the screen. There is basicly 2 places the matrix can fail, the first place is where the panel connects to the board (like in the fix you posted) and the other is actually inside the panel itself. If it's the connection inside the panel, then it's toast. However if it's the board you are saved, the only problem being is that there is no easy way to confirm without changing the board where the break is exactly.
If the problem is on the board itself there is a bit of a bush mechanic way to try and solve it.
Remove the board from the unit, get some aluminium foil and cover all plastic areas and surrounding board parts except the solder connections to the connectors in the lowest pic of the site you posted, also leave the black square and corresponding solder joints exposed (right next to the plug). Then get a heat gun (used for stripping paint) and run around the areas exposed as mentioned evenly. The idea is to reflow the solder joints in that area, try not to hold it in one spot too long but rather move around slowly and evenly but only on the areas we want to reflow of course. This will give you a good indication if the board is faulty. If you cook the board no great loss it's a good chance the tv is junk anyway (bad panel).
The only other way to see if the panel is faulty is to tap it firmly around the edges with somthing solid, being careful not to damage the panel/casing/board obiously. The tapping would be the last resort before the tip because even if it does change the picture there is little that you can do to make it a permanent fix.
Btw the board the tech aparently replaced was the same board as in the fix you posted, if that did get changed to no avail then it looks like it's the panel.
Hope i've answered your question in enough detail.
Here is a comical video of some crazy guy fixing a panel with similar problem as yours using a baseball bat:
Hope this info has been helpful
Posted on May 25, 2009
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Posted on Jan 02, 2017
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