Originally Posted by Melgar
just tried that.
i flashed it with patched 3.55 firmware with my keys.
after that the PS3 turned ON, and askes for a 3.56 UPDATE PUP file.
did that, it installed the 3.56 orignal FW from the usb-device and formated the HDD.
after the reboot it asked again for same 3.56 update, did it again, but still asking on every reboot for the same 3.56 update.
so i tried with the patched 3.41 PUP file that is used for downgrade, it did install it and after success the PS3 went OFF.
but now it doesnīt boot up anymore.
it just turn on for 3secīs, then short yellow LED and turnīs fully OFF.
tried to flash it again with the backup-file a few times, but still doesnt boot.
i verified each flashing process by reading dump after flash and comparing, all is 100% ok.
any ideaon that problem? 
thanks for any help...
regards,
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flash the 3.55 fw again to nor, if screen tell you press ps button - then don't
just use downgrade method, puting updat.pup to root in usb drive and use ps3 jig. ps3 wont show any screen on this proccess, only inticators are flashing lights :D