guys, help me pls, is there any step to fix this problem. when im install the CFW 5.50 Gen-D and after the installation hve done, i try to turn on my psp but there is no picture on the screen, just a green light. please. i knw this is because the CFW. but someone please help me, i really need your help. i've search so many website to fix this but its not working. they say i hve to use pandora batt, and where should i buy this stuff? is there any other way?

thank you

 

You bricked. I'm guessing you flashed 5.50GEN-D3 straight from chickHEN/MHUSpeed. The safer way would have been to flash 5.00M33 then flash 5.50GEN-D3.
You need a pandora battery/datel tool battery. Get one of those (use google) then follow the "Pandora/MMS Guide for installing CFW"

 

If he can even use a Pandora, I don't think he stated what type of PSP he has.