Laptop hardware

Hello,
I have a problem in my DELL laptop. It is turning on and then the screen is going blank and black after showing some ubuntu commands. before that My laptop was running well and suddenly this problem occurred. So I can't format also. Please help me and give me any solution from which I can turn on my laptop properly again and do the works again properly. i could'nt find this is hardware problem or OS problem pls reply me pls plsssssssss