Recently we got a Samsung LED 50 in HD in and it had vertical lines from the left to right throughout the screen. After another shop had previously tried to fix it, he brought it into Jim’s TV and Stereo. We found a PIECE OF AN INNER TUBE Jerry rigged to push the main board out to make it work. And we found the main board was bad!
So to fix the TV correctly, we ordered the main board from one of our reputable suppliers and put it in the TV. It works great!
FYI, even if something unforeseen happens, we give a one year warranty on all of our repairs.