So i was upgrading my PSP firmware to 3.72 when i left it in my room as it was taking a while, i came Back and the psp was turned off, and now it doesnt turn on any more, the screen will stay Black but the green Power Light comes on then goes off after about a minute.
anyone know whats Happened, and can help me get it to work again?

Oh, ive only just got a new one, as my old one was smashed up by some kids at school.

Thanks for the help.