I'd replace the cheapest part first.
But you didn't share the exact model. I'm finding 200 buck laptops to sometimes be cheaper than repair and in some cases if the model is too old, faster.
I have a Dell Latitude e6400 (Windows 7) and up until yesterday these vertical dark spots appear on the bottom of the screen. The splotches sometimes are worse than this. any reason why? Is there a way to fix this?
P.S the white screen is not normal either. It shows up when the Laptop shuts down and starts up for 2 seconds or more, then displays the normal screenhttp://s3.postimg.org/nv6zm72ib/image1_1.png
Please help I use this laptop for school

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