Red Vertical bars cover the right 1/4 of the screen. They starting appearing sporadically several weeks ago and would go away, now they stay on the screen, regardless of video input ..

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Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

Check the main filter capacitors at its power regulator board. Replace if found bulged or damaged. Replace all secondary side supply rails' filter capacitors too. The fault is with damaged electrolytic capacitors at the power regulator board itself.

I've got the same TV with the same problem. Sometimes by moving it on the stand the lines will go away but it only sometimes temporarily fixes the problem. For a while it seemed like it needed to heat up to go away but that is not the case. It seems like there is a bad connection somewhere but i cant seem to find it. One day, one thing will fix it, then the next day it wont do the trick. It gets very irritating.

That problem caused by a connection between LCD crystal and matrix driver,no tools yet to reconnect that metal to crystal connector,Claim warranty right away that will multiply or became larger.

You could have one of three problems. One is really expensing to fix and you might want to trash the set. Thats if the panel is bad. Secondly, it could be a buffer board that went back. Not as expensive as the panel. Finally, it could be the connection between the two. I would first take the back off and locate this board. Undo the ribbon cable and clean it off a bit and put it back. If its still there, you have a deeper problem.

1. Frist on the BURN MODE.
2. Check whether same
Vertical lines on screen ?? 3. If yes ..?
4. Then change the LOGIC BOARD or PDP

I had the same problem -red, vertical bars along the right side of my Samsung 42" Plasma- and this is what fixed it: Removed unterminated cable.
I had hooked up an HD video camera to the set about two weeks ago. While I disconnected the camera I left the other end of the connector cable plugged into the T.V.. As I've since learned from friends who work in television, this is what's called an "unterminated cable" -meaning one end is unconnected. It can lead to problems with electrical interference and appears to have been the problem in this case; When I disconnected this cable from the T.V. the red bars went away.
So, check your cables. Make sure everything is properly connected and get rid of anything that might be picking up interference.

Had this same issue on right side of 52" about 1 inch from side but had 3 vertical lines that disappeared after 40 minutes. Have Samsung LNT5265FX/XXA and about 16 months old. LCD Panel itself had to be replaced to fix it, fortunately had extended service plan

What is the model number it sounds like pixel problems or board problems. For more info ctechnicians.com

I had the same problem -red, vertical bars along the right side of my Samsung 42" Plasma- and this is what fixed it: Removed unterminated cable.  
I had hooked up an HD video camera to the set about two weeks ago.  While I disconnected the camera I left the other end of the connector cable plugged into the T.V..  As I've since learned from friends who work in television, this is what's called an "unterminated cable" -meaning one end is unconnected.  It can lead to problems with electrical interference and appears to have been the problem in this case;  When I disconnected this cable from the T.V. the red bars went away.
So, check your cables.  Make sure everything is properly connected and get rid of anything that might be picking up interference.  
Hope this makes sense.