Chosen Solution
The screen has small, white lines across the top and from time to time the screen freezes, I have found a remedy to this but it does not really work. I adjust the angle of the screen, this only fixes the freezing screen though.
Cillian, if adjusting the angle of the screen fixes the issues with lines going through the LCD, you could have issues with the display cable. The freezing of the screen could be a memory issue as well as a GPU issue. Try an external monitor and see what you get. If that works, you will have to take your laptop apart and take a look at the cable and connector. I would also recommend to change the thermal paste on the GPU/CPU etc.