Hello,it's a frozen screen problem or screen key board problem.it is a hardware problem that can be fixed by an hardware specialist by replacing the frozen screen or if you are also good in fixing hardware and also have the required tools you can do it yourself.but if you are not so good on repairs i will advice you take it to the expert to help you see if it's the screen problem or screen keyboard problem.you can equally take it to the store of purchase for their repair expert to help you look at it.
wish you good luck,

take care.