Fail Google translate, sorry,lol
Since firmware 1.51, you can now enter recovery mode by turning off the PSVita usually function without using the complete shutdown.
Probably to resolve the crash issue where you can no longer power on the PSVita.
Very happy, merry christmas.
PS Vitamina Recovery Mode Menu, lol
Maybe not work if you have USB cable plugged in to your pc!
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http://brazmii.blogspot.com/