I use psp slim 2006 i already have a pandora batery and magic memory card and i want to downgrade from version 6.10 to 5.00 m33-4.I already put the magic card and then put the batery but when i turn on my psp its doesn't appear anything even the flash or menu its on normal nothing happen and why that happen i already pull the trigger L or R but nothing happen.help me
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