Answer to: Vertical lines only on screenHi, Had this issue with a sony laptop, hook up to an external moniter and if it displays fine on that then its the screen and not the graphics card. youtube taking out the screen and replacing (very carefully as the cover screen will crack). You might be lucky and just have a loose lead into the back of the lcd. Plenty of people offer screen replacement service for £150 fitted online (apple is nearer £300). If its the graphics card then unfortunatly it may be the system has got so hot the chip has lifted sightly (bad solder mix/lead free that all companies seemed to use for a coupe of years, melts at lower temps) to remedy this it would need to be re-seated professionaly (not just heated as thats temporary) that again if you look around can be done for £100 upward. Good luck and hope I've helped.