Thin coloured lines running down center of tv. Panasonic Viera.

If this is a pencil thin line you have a bad plasma panel. The plasma panel is no longer available.

I’m happy to help further over the phone at https://www.6ya.com/expert/dewayne_4a10eab6caecdb92

http://service.us.panasonic.com/OPERMANPDF/TH42PZ80U.PDF

Here is a copy of your users manual, it tells you how to adjust the color on the TV, Magnets do not affect Plasma TV's. If your picture looks bad you might have a defective or failing part if you just need to turn the red up or down or make the picture more blue or green the users manual tells you how to adjust it.

Sound like your Y-Sustain board has one foot in the grave. The Y upper buffer and Y lower buffer boards go when the Y Sus Goes too...

make sure your speaker to your sheron sound isnt to close to it .also if dvd player is the source then move away from tv will demagnatize the tv theres a magnet in them

it depends on what connection that you are using. usually if u r using a cable cord this problem will occur.

Back light inverters need to be replace.

The most common reason for a digital TV to read "No Signal," or to constantly suffer from frozen screens is poor cable connections. First thing you want to do is to check to make sure they are all correct, and that you are using cables rated for your system. Next is that you want to remember that the fewer lines you use, the stronger your connection will be. If your connections are all good, check to see if you are using splitters. Imagine your cables are actually water lines. It would be easy to see how thin your flow will be if you have a half a different different directions and lines through which you are forcing it to flow. If you can limit the number of lines you have connected, then your signal will be stronger. There are often a number of different ways to wire a sound system and peripheral components to your home theater. Sit down and review it. Anyplace you can eliminate a line (or mess of lines!), the stronger your signal will ultimately be when it gets to your TV's receiver.

If you are using cable and none of this works, chances are you have a "leak" in your line somewhere which needs to be reviewed by your provider. Be sure to remove all splitters and all such diverting sources before they arrive, though, as if the problem is found indoors, you will very likely be charged for this as a service call.

Either the buffer board is bad or the plasma panel,sometimes it coult be bad connections on the interconnect ribbon cables from the plasma panel to the buffer boards.

YOu have no vertical deflection. Call the repairman.

I have two vertical very thin green lines on TV how do I fix