Verticle green purple bars

The T con Board or the LCD panel is faulty. Can confirm by replacing the TCON board.
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

verticle lines are most likely a bad tube or convergence problem. You will not be able to fix this your self . I suspect a bad convergence ic

Plasma screens are extremely susceptible to getting broken from any impacts to the face of the screen. What you are describing sound very much like distorted or dead pixels. It may not be a fixable issue, you may have to replace the entire unit or live with the purple bar. The reason you don't notice it as much when the screen is dark is because purple is on the darker end of the spectrum, and will be most visible in contrast to lighter ad brighter colors.

Sounds like t'Con board fault. Contact any service technician to make it confirm.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, screen faults & possible causes to LCD screen are given with illustrations.

You have bad LCD panel due to the TFT (Thin Film Transistor) driving circuits, no much you can do, not worh replacing the LCD panel. You cantry reseating the T-CON connectors.
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague

Just go to the service center where you bought that tv ,cause its ,one year warranty period. just consult your tv to the costomer service personel.

Hello...The problem you're describing is related to the green lcd and most likely the main board(green channel). If the focusing removes the purple(you have *that* much dust in the unit?) then it *is* dust. You should be able to focus on the dust particles twice--dust on the front of the lcd and dust stuck to the back of it. I'm gonna give you the color table so you know what to look for and what you're seeing. Red LCD=cyan(baby blue) onscreen; Green LCD=violet(purple) onscreen; Blue LCD=yellow onscreen
If you have a lot of dust(and the green lcd usually is the main culprit by the design of the lcd panels around a glass "cube" internally) you might try blowing some air into the unit when it's cool. However, the unit probably needs a good cleaning--remember to clean the dust filter! To properly clean the unit, a trained tech will have to perform the job. The lcd panels are DELICATE and precisely positioned for displaying a sharp image.

you're video card is failing, try the secondary port if you have one, artifacting such as different colors, shapes and lines are VGA related, you need a new VGA card and for more info contact http://tinyurl.com/m7ghqz

that is due to lcd filter problem

your picture tube is not blown you are having problem in the color circuit there is an ic that controls that circuit,the tv is also having a vertical problem an ic also controls that circuit you will have to call a tech to repair your tv good luck