Ok my knowledge on this is very limited so please bear with me But I do Know that a Full(People also call it a perma) Is reversable just read this
There are two types of Bricks a semi-Brick and a Full brick this will try to help you Un-brick Both of them (i'm not promising anything)
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What you need:
Memory stick (blank is better)
Pandora battery
-------------------------Semi-BricK (psp turns on. can go into recovery menu (Hold R button). Blank screen when psp turns on. Turns off after a couple of seconds.------------------------------------------------------
How to fix:
1: Hook you're pc up to you're psp
2: Go into recovery and push USB mode
3: Use the first step in The "How to hack a psp" Guide. Make sure when it says to Choose a number (When putting in youre psp type) Push 4 instead.
4: Put the memory stick in the psp FIRST
5: Put in the Pandora battery
6: Push x (Psp slim)
----------------------------Full Brick (Psp turns on. Can NOT go into recovery. Blank screen when psp turns on. Turns off after a couple of seconds.--------------------------------------------------------------------
1: Find a device that can read a memory stick
2: Put the memory stick into the device
3: Use the first step in The "How to hack a psp" Guide. (it shouldn't mess up the device so you really don't have to worry) Make sure when it says to "Choose a number" (When putting in youre psp type) Push 4 instead.
4: Put the memory stick in the psp FIRST
5: Put in the Pandora battery
6: Push x (Psp slim)
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I hope this guide helped you out if you did anything else and the symptoms are different this probaly won't work but if it does congradulations
(R^ if I helped please)