i have a psp 1001 firmware 5.00 m33

one day as usual i was playing my games when it suddenly turned off
since then when i insert my battery an orange light comes on the led as if it is charging but it is not
i can't on my psp with the battery
when i insert ac adapter(without battery) the orange light comes when i switch it on the glow gets more powerful but the system does not turn on..
please help
and i also noticed that when i open the battery case and remove the battery the orange light goes off and one of the four screws is missing.

Auto-Merge: i think battery has been pandorized too