Restarting on its own

Hi

Problem is on s7 edge( T-Mobile ) when i took the phone from customer it was working fine, fine in the sense all the function r working as usually, after replacing the screen phone is restarting on its own for every 1mins, I dnt know what is going, I searched online try go on safe mode some app are doing bla bla bla, When try to delete does stuff but still restarting again, ph is getting hotter, screen touch Sensitive is slow. Can u guys help solving this problem, ist that a screen issue or any internal damage, I dint even glued the whole screen I was just making sure touch is working properly before putting back the screen

Can u plz guide me what to do