Laptop suddenly had horizontal lines running across the screen

Suddeenly horizontal lines appreared across the screen .
I have shut down and started up the computer numerous times and it does not go away .
It also affects the graphics and text on the screen .
If I cannot fix should I have the computer cleaned and set back to factory standard and how do i do that /
Thanks

2 possibilities:
1. The video chip (motherboard) has gone bad; or,
2. Just the screen has gone bad.
Connect the computer to an external monitor and see if the lines appear on it. If so, it is #1.
It is doubtful that restoring the laptop to factory specs will have any effect on the isue either way but if you want to do that you can tap F11 as you power up to enter factory reset.

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