My psp 1000 wont boot up

I recently got a modded psp 1000 from a friend, it worked fine up until about a couple hours ago. I dropped and the battery fell out, I put it back in but it won't fully boot now. The green light turns on, and the led in the screen turns out but it's just black. I've tried to put it into recovery mode but it won't work (I could be doing it wrong though) I was really looking forward to playing my games and buying new ones so I really hope I didn't break it.