Laptop repair?

My laptop screen keeps going black and fuzzy. i then have to restart the computer. the laptop no longer works without bieng plugged in to the charger and still shuts down . does someone have any idea as to what these problems could be and any advice on what to do?? thanks
Answer
Hi the same thing happen to my mother but she had a laptop off ebay,she paid 200 pound get a new one there is no point. also if someone reading this and thinking of getting a second hand laptop don’t!!! it’s a waist of time and money the life expectance of a lap top is 3 years buy new it’s a little bit more money but it save you a lot of time and haste.