I'm sorry to hear that you're having this issue with your LCD.
Unfortunately, it sounds like it will have to be serviced if this is happening on all inputs. I'd recommend contacting the Samsung customer service center for further troubleshooting.
If it's only happening on one input, then it may be the device sending the signal.
I have lines running up and down my Samsung LN46B650TIFXZA. They are not thin lines, but rather an imprinted coloring that runs up and down the length of the television. I tried to upgrade the newest software but to no avail. Is there anything that I can do?