Sounds like either the cable that connects the display or the display itself is having problems. Try this...
1. Turn the laptop off (not sleep or hibernate but off).
2. Connect an external monitor to the laptop.
3. Turn on the external monitor.
4. Turn on the laptop.
NOTE: You may have to press an "external monitor" button. Could be the f4 button or a button with two monitors on it, for the external monitor to work.
If you can see fine on the external monitor, then your attached display, or the ribbon cable that connects it, are your problem.
If you can't see on the external monitor at all, or the problem occurs on the external monitor as well, then it is probably the graphics card/GPU that is the problem, which may require the motherboard be replaced.
You may also want to try hitting CTRL + SHIFT + WIN + B to try and reset your graphics driver as another possible fix.
i had a pink line on my screen and i fixed it on my own how u ask simple and did not have to tear it about or anything like that just take like a credit card or any type and go to bottom and do one slight touch and watch it disaper and question let me know and i will try to answer the best i can if i cant i will ask my husband hes a great computer guy