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Attached is a picture of the problem I have with a Panasonic TC-P42C2. There is a band of red and blue lines across the screen.

Does anyone know which board causes this problem?

Anyone have a repair manual?
 

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Not sure if this will help but I did a search on google and came across this link (justanswer).

Looks like same problem with a panasonic hdtv.

Solution is below per that website (justanswer).

"This problem can happen due to several things. The power supply is a common cause of this problem. The capacitors on this board can swell and bulge due to receiving a surge, and can cause a voltage drop on one of the outputs on the PS. This typically will cost you $150 to have repaired.

The other very common issues, are problems with the Y Sustain, and Z Sustain boards failing. They are responsible for lighting the Plasma display and are common failures for this type of TV. The voltages need to be measured by an experience professional between the power supply and these boards, and also from the boards to the Plasma Panel. Average cost for this type of repair is around $300 parts and labor.

I wish I had better news, but the set will require component level testing and replacement in order to function properly again."
 

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I have never seen a problem like that be a failing sustain board nor a power supply. I would contact someone experienced with Panasonic PDP repair and get an estimate, but this looks like a signal processing problem. I would not trust advice from the source above.
 

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Hi, I have the exact same problem. The pattern is in the same location as yours. My tv is less than 2 years old. It's the TCP58vt25 version.

Did you figure what was wrong? Repair? Costs?

Thanks
 
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