If it boots into the XMB with a red FSM logo in the corner you are using an old PSGrade.

You will not have anything on the screen, you can only tell it is installing by the flashing USB and PS3s HDD light.

A logfile should be present in root of the USB Mass Storage Device with no errors.

Remove the QA-toggle package to prevent it from getting QA-flag reset).

Console runs 3.55 and any firmware of choice can be installed, no longer needing to be patched for downgrader.

Check UPDATERLOG.TXT in root of USB Mass Storage device (it should have manufacturing updating SUCCESS(0x8002f000) in end section).

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Nor CabConModding in anyway What is PS3 Downgrade PS3 downgrade, from the name of it is to go from Higher PS3 firmware to a lower one, and to be specific PS3 Downgrade is to go down from any FW (Firmware) more than 3.55 and go down to 3.55 What is the purpose of PS3 Downgrade The main purpose of PS3 downgrade is to install CFW (Custom Firmware), which is used to run games backups, Homebrews, emulatorsetc.

Is there any other way than Downgrade a PS3 Unfortunately, if your PS3 System Firmware is more than 3.55 you need to downgrade.

Till this date. How to know Your PS3 System Firmware To know your PS3 System Firmware, go To Setting-System Settings- System Information (and there you have your System information.

So Are All PS3s are Downgradable 1- Simple Answer No, all PS3 that came from Sony Factory with System Firmware 3.56 or less can be downgraded (with Rare Cases for 3.60 FW PS3) and any PS3 with FW from Sony Factory 3.60 and more are not downgradable and any attempt to do that will brick your system.

Another way to know the PS3is downgradable, is the PS3 Model (as seen in Photo2): o All Fat Models are Downgradables o Slims with Model No: CECH-25xx and less are downgradable, SomeSlims with Model CECH 25xx and all CECH -30xx are NOT downgradable.

And common sense.

It is a compensation of both Hardware and software.

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Ps3 Downgrade Ofw 4.21 To Cfw 3.55