*** Friendly Notes : Proceed at your own RISK.***
Semi-Bricked PSP 3000 condition :
PSP couldn't boot into the XMB (black screen and green light, then no green light and no XMB) but it can boot into recovery mode.
Requirement :
1) Download these file :
2) Brain
Procedure :
1) Boot your PSP into RECOVERY Mode.
2) Select Option "TOGGLE USB Mode"
***It should bring you your MEMORY Stick.***
3) If your Memory Stick Doesn't showed up, go into "CONFIG" and check to make sure the "XMB USB
Device" is set to "Memory Stick" (use left and right to adjust)
4) Place both of the files you downloaded in your ms0:/PSP/GAME/.
5) From your PC, run "Semi-BrickRecovery.exe" in the folder.
***This will create two folders (or merge if they exist) called "RECOVERY" and "UPDATE". Inside
UPDATE there should be a file called OFW.PBP and inside RECOVERY there should be an
EBOOT.PBP and a trick.prx file. This will upgrade the PSP to 6.35***
Move the EBOOT.PBP from the archive into the update folder, renaming it OFW.PBP so it replaces the current one.
6) Delete your SEPLUGINS folder from the root of your memory stick. Why? Because your plugins might
cause problems.
7) Turn Off USB. Choose the "Reset Device" option, press X and hold R to go back into recovery
mode again.
8) Pick the option that reads "Run /PSP/GAME/RECOVERY/EBOOT.PBP"
9) An application should open, telling you to either press X or R if you want to install OFW or not.Suggested
Action : Just press X.
After you've done all 9th STEPS above your PSP will go black, then spend a little bit of time loading the updater. Then it'll run it. Update like normal, and you'll have 6.35 OFW (or whichever version you chose).
Note : Dear readers, this guide was taken from https://forums.dashhacks.com. I hope it helps you! :)
Credits :
hmohammed43