Right half of screen blanks out

perform a soft reset. Turn off the TV, unplug the connector from the socket, and wait 2 minutes. ...

not knowing the model... i will try to help with this common samsung issue, if i can. / unplug the tv, and wait a few minutes to avoid shocks. / remove back panel. you will see several ribbon connectors, (about an 1" to 1 1/2" wide) usually near the bottom. / carefully remove the ribbon (ONE AT A TIME) and clean the contacts GENTLY with a pencil eraser. (DO NOT use chemicals) / reinsert the ribbons and try the tv. // vertical stripes are almost always the result of poor contact between ribbon and socket. / NOTE!. you can do a quick test before opening the set by [carefully!!!!] twisting the screen and watch to see if the vertical stripes change or disappear. / if the stripes change, bet on it being the ribbon contact problem.//// hope this helps, it has worked on a number of TVs.------Jay

Main power supply regulator board can cause this. 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, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

It can be but rarely the main board, most of these sets have either one or two boards that drive the image on the screen, different names like T-con or Y out etc. the right side board could be the problem or a bad connector or ribbon cable for that side of the screen unit.

Several possible cures and none are a snap to find in most cases.

ck x board ribbon cables

Full instructions from DELL at:

http://support.dell.com/support/topics/global.aspx/support/dsn/en/document?c=us&docid=FC55E86F0611BEE3E030030ABD620A8C&l=en&s=gen

Please rate this response thanks.

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?

I'm not an expert, but I have determined that the vertical bars that are often red, sometimes blue ... and sometimes both ... are related to a bad control board. I've also read that a common fix is to buy a repair kit with includes the ysus, zsus and control boards ... all replaced together. My experience was that after a month or two with the 1.5" wide stripes, that you eventually loose the entire picture and have sound only. MIne comes back, but won't stay working for very long and the stripes are always there (buy used to fade and flicker sometimes). I'm planning on replacing the control board.

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.

Sounds to me that you have a bad connection/wire to the CCFL bulb on that side of the display. Should be an easy fix, do it your selfer thing.