You have a semi brick psp, if your psp is scph-100x fat or scph-200x slim (not ta088v3), you can fix its under recovery menu. hold right button while turn on psp then, goto advance and select format flash1 and reset setting.. or by unbrick your psp using pandora battery.
otherwise, you might to send it back to sony if your psp ta088v3 or psp scph-300x
Cause: PSP got bricked when trying to install the 5.50 GEN-A Custom Firmware and accidentally...
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Cause: PSP got bricked when trying to install the 5.50 GEN-A Custom Firmware and accidentally installed the Quick Updater... Effect:Blank screen PSP Slim (Another dead PSP)... I need help installing a Pandora Battery and a Magic Memory Stick, Tell me where to understand to fix this problem, so I could "Resurrect" the PSP.