Facing TV Problems? Ask a TV Technician.
Hello, and sorry you're having problems.
These lines can be caused by several things. In order to narrow it down I need to ask for more info.
1) If you pull up the Samsung's MENU screen, do these lines show up OVER the MENU?
2) Also what color are these lines, and how thick are they?
Did you need assistance with this?
If you can describe those lines and also tell me if the MENU is covered by them then I can tell you what is wrong with your TV. Let me know.