Question about Panasonic Viera TH-42PZ80U Plasma TV
Sounds like a faulty Plasma Display Panel.
Contact Panasonic and find out if it is still covered under warranty.
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Posted on May 28, 2011
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Posted on Jan 02, 2017
I work for a auth LG service center and each time I have had this symptom we had to either change what called the T_CON control board or the Plasma display panel itself. You need to cocntact LG @ 800-253-0000 report your problem and they will find a service center in your area you should have 1 year warranty parts and labor.
Posted on Mar 10, 2008
If the set is still in warranty, call for warranty service. If not and you feel comfortable working on the set, carefully open up the back and reseat all of hte cables and connectors. This can be caused by marginal connections inside the set.
Keep us posted on your progress and results.
Posted on Aug 29, 2008
The red line driver at that point isn't working or there is a bad connection to the panel for that line. (I assume the intensity and hue of the cyan line varies witht the picture). What type of screen is it? Plasma or LCD? The following is for LCDs and may not apply to plasma panels. (I haven't had to fix those yet.)
Once in a while you can solve the problem on an LCD by gently massaging the connector to the display panel edge at the bad spot, although there is a risk of causing other lines to drop out. I once fixed an LCD that had a hair caught between the elastomeric connector and the display glass, but if that were the culprit in your case, you'd probably be missing more than one line. It could also be a problem with the driver chip for that line.
Be very careful about tearing into the LCD. The connections are very delicate, the fluorescent backlight tubes are glass and have mercury inside, and the potential for electrostatic discharge damage is always a concern. It's easy to cause more problems than you fix when you get into the connections, although those can usually be reversed with patience and steady hands. The worst case is a misalignment that would mess up your color registration (color drive going to the wrong line). Most panels have a sticker inside warning against removing the driver electronics. It's there for a good reason.
If I've scared you off, or if the connector massage doesn't work, there are companies like Moniserv that specialize in repairing LCDs. They have the equipment and dust-free facilities needed to repair bad panel drivers.
Posted on Mar 23, 2009
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