Galaxy s4 camera fail

When I use the camera app it shows just a black screen and it says camera failed. Also I tried using a third party camera app and the front camera worked but the rear had green lines running across the screen. I went online and tried everything software wise to get it back to normal. I wiped the cache Portion and did a factory reset but still the same thing happened. Then I bought a new rear camera and still nothing. When I opened the third party camera the screen was black for the rear but worked in the front. Any other ideas?