Dropped my daughters PSP

if its not an LCD problem....

this is what we call a BRICK ...

usually this happens when you are upgrading your firmware
then the upgrading process is interrupted (empty batt.. etc)

you could send it back to sony and have them fix it

OR

buy a new motherboard ... costs half the price of a psp unit i think

OR

get pandoras battery and magic memory stick and resurrect your psp :D

*google for pandoras battery and read up *