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Brick-Recovery Procedure from CFW4.21 back to CFW3.55

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After Testing with some bricked Slim consoles ( from updating to CFW4.21 ) with different friends and testers around the world,

I can confirm that Bricked consoles can be recovered back to CFW3.55 even if you didn't have a NOR Dump/Backup .

Requirements are:

1- a Hardware Flasher so you can read/write to the PS3 NOR flash

2- A Dongle with PSgrade payload (any old jailbreak dongle + PSGrade hex will do) used to Enter Factory Service Mode (FSM)

3- Rogero CEX3.55 v3.7 PUP

Recovery Procedure :

1- Dump the current NOR Flash of the bricked PS3 at least 3 times using a hardware flasher (Progskeet / E3 / TEENSY++)

2- Verify that it is properly dumped and you have a valid dump ready to be patched with the downgrade patches.

3- Patch the dump using Rogero PS3 NOR Auto Patcher or any other Program available.

3- Flash the Patched Dump back into the PS3 NOR using the Hardware flasher.

4- From this point you can continue as a normal Downgrade Procedure by entering Factory Service Mode using the dongle and Flashing Rogero CEX-3.55 v3.7 from the USB stick.

more info and details will be added to this post gradually as needed....

Source: http://www.tortuga-cove.com/forums/viewtopic.php?t=3654&p=9275#p9275

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