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Re: LG 52 inch plasma screen discoloration
This indicates that one of the intelligence power modules (IPM) is failing on the X sustain board inside your unit. If the picture becomes annoyingly noticeable you will need to have the X sustain board replaced (this component cannot be repaired on the board).
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If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.
Hate to give you some bad news...But most likely you have a defective screen. You may be lucky and just have a bad T-con board. Which will do the same thing. But, this is a slim chance of it being the issue. As I have had many of these with bad screens. And only 2 were the T-con board which the color was off and pict was darker than normal. It is the board at the top center of the TV.
A strange fault you denotes here indeed. Haven't came across this type of fault with Plasma TV. I suggest you to contact the authorized service center for LG. Never do anything to it. Gopakumar Gopalan Google
1. Unplug unit from wall for 3 minutes; 2. Press & hold Power button for 1 minute; 3. Plug in unit. OR: 1. Unplug for 3 minutes. 2. Plug in unit. 3. HOLD Power Button as unit starts ... hold until the unit flickers on then off twice.
This effectively returns the components to factory specs, much like resetting a computer. It offers a *temporary* fix, lasting 45 minutes to hours. All depends on the unit.
Mom has an Insignia 32" with the same color separation problem, which worsens as the day progresses. Best results achieved while television is cold.
Dust in the unit could contribute to the problem ... try to keep the unit dust free as possible.
You could possibly be dealing with a failing LCD panel. I've seen many of the dark spots in Samsung sets and it's due to defective LCD panel tabs. The only true fix is the replace the panel which would cost more than a new TV !!!