42 Plasma TV has many vertical lines (stripes) . At the beginning, it had just 2 to 4 red, blue, white lines. More and more lines connected to become white stripes occupying about half of the screen now.

LG plasma vertical line repair - YouTube

? 2:33
https://www.youtube.com/watch?v=24FkcQoeGPg
Feb 10, 2013 - Uploaded by Matt Mayer
I have an LG plasma, my vertical line is in the middle, as if one would have ... Panasonic Plasma TV TC-P50X5 Vertical GreenBar Line Fix ...

EASY HOW TO FIX LG plasma TV - color bars - YouTube

? 4:45
https://www.youtube.com/watch?v=QyaBiSkc1l8
Dec 16, 2010 - Uploaded by Tampatec
diy HDTV Plasma tv repair tv reparar the red green blue color stripe line vertical bars T- control t-con ..

Fixed mine, myself! Black 3 inch vertical band (stripe) appeared after a cros country move on our PC-T50G10. Occasionally we would see white band with multicolored pixel width stripes. Took the risk of taking off the back to see if I could see anything. Found places on sides and bottoms where plastic like 2" flat cables could be seen. Guesstimated where the band was and found that I could flip down a black cover on one end of the cable. Tried to pull it, gently. Mistake. Realized it wouldn't one out like computer hard drive cables, so I took out the screws holding the plate on the other end (it's only an inch long). That allowed me remove the cable. Took it out, cleared away dust, put t back and closed the black over. It worked! Put the screws back in, back on and... we are happy (although I do have four extra screws!). Just be gentle.

I have a 42" Electrograph plasma and it has a 2" black vertical line on the left side of the screen.

HP-R4252 NOT LCD TV
IF LCD TV has vertical lines try cleaning T-con board to lcd panel cable or replaced t-con board

may be worth getting repiared,sounds like decoder video o/p.or line o/p stage.

NOt very clear.....

Multiple stripes all over the screen? Vertical or horizontal?

If it's only like an inch vertical lines put a mark on the cabinet where exaclty the line is, turn off the TV then open the back, you'll see lots of ribbon wires (gold color) from the plasma panel it self going to buffer boards, using the mark find the closest ribbon wire where the line is showing then remove and clean the contacts, make sure to reseat it properly when putting it back otherwise you'll just add more lines or black bar on the screen if pins are not seating properly.
But do not be afraid if the lines get worst just turn the power off right away and reaset the ribbon wire till you get it correctly.

CAUTION;
DO NOT try to do this while the TV is on oherwise you'll burn COF (Chip on film) on the panel and you'll end up replacing the whole PDP.

Good luck!

We originally had a red stripe roughly 3" wide running vertically on the ride edge area of our Panasonic 52" Viera plasma tv. It has now been joined by a solid black stripe of the same width running from the top to the bottom. Living in Germany and purchased at local PX long enough ago that the warranty is likely expired. Now what?

if you can still see the picture its most likely the control board that's going bad, you will still need a tech out to fix the issue.

My 42" Samsung Plasma HDTV HP-R4252 has a 2" vertical strip of green pixels down the right side of the screen.

My 3 year warranty with Circuit City expires in Nov 2008.. so I hope I'm covered.. can't call until the morning.

Samsung said it might be a logic board problem.. but they want almost $2000 to fix. I might as well buy another TV if Circuit City can't fix it.

The bad news, it sounds like tou have a bad plasma panel.One of the vertical drive arrays are in the process of failing.This part is part of the display panel.