Help can you please tell me whats wrong with my psp?

ok my nephew(1 yr old) hit it with a broom and now i need to plug in the psp to turn it on. not because its not charges but i don't know what else. so when i do plug it in to turn it on it restarted when you first open it and it tells you to put the time,date,etc.. and now the screen is half black-ish with colors around the border and the other half looks like a flickering screen. Whats wrong with it and where or who or how can i fix it?