psp dosent work after using pandoras battery!!! help! plzzz lol?

[help meee plzz lol]

after using a fat pandoras battery on my psp to downgrade it to 3.71 m33, my psp dosent recognise anything! no umd, wrong region not even interent works! and my mac address is missing , noooooooo!! help if u can plz!

 

[Cyle B]

i think you messed up something bad, im not familiar with the psp but if theres anyway u can recover the old version of it, do it. The update you did might have been corrupt and thats why nothing is working.