Wow im Need help!!!

Ok guys so i waited too long to "hack" my psp fat
well i did it yesterday with TOTALNewbieasyInstallerPandorasmenu program
well i pandorized my psp battery but im having trouble downgrading my psp with my memory stik
when i put in my battery green light is on but my psp does nothing else even when i put in my memory stik
i need help downgrading my psp OFW 3.80

Plz help

Next time post this in the "Help" section.

kk theres no point of getting tht get custom firmware 3.90 M33 or 3.80 M33-5
and if yu screw up u can unbrick it with pandora's battery

What is your current version, and to what version do you want to upgrade/downgrade?

Is your psp fat or slim? If its slim, you'll need to flip the power switch to the hold position, then insert your mem stick and battery while holding the L trigger. When the green light turns off, take the battery out and flip the power switch back to its normal position then insert your battery while holding the L trigger and the menu should pop up.