Solved! *HELP* Black screen with horizontal lines that only happen sometimes

[IsaacDaddy]

So I own a gaming laptop and only sometimes (Maybe once a fortnight) my laptop goes black with horizontal pink And some other coloured lines And then eventually just goes away. What is this issue and how can I fix this ??? Thanks in advance

 

[helpstar]

might be the cable between the motherboard and the display inside the laptop
try an external monitor, if it happens there too, it might be the graphics chip if not -> cable or display of the laptop is faulty