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I am sorry for asking so many questions but i really need some help i want to get off of DEX and go back to CEX i will provide pics if needed i really been trying for days.

PS3 System Firmware 3.55
IP Address: --HIDDEN--
LV2 Kernel: CEX
Target Type: DEX
Free HDD Space: whatever

I followed CHOCO's steps on how to cex2dex. In the description I was never told to save a backup of the flash so I never did. I do have that .bin file that saved on my usb. If anyone could please help me. I would at least want to go back to CEX or at least update my current CFW. Please help

---------- Post added at 08:45 PM ---------- Previous post was at 07:00 PM ----------

I do not understand everyone works on these things i have all files tools and firmware

Bro follow the tutorial

How to create a valid CEX dump from DEX
Install all homebrew 1st (HombrewPackage) (MultiMan)
eEID Root Key Dumper.pkg
memdump_0.01-FINAL.npdrm
reboot.pkg
multiman4.10cex.pkg
QA Flag (Not the one REBUG offers)
Install CFW 3.55 w/Retail Patched CoreOS
The PS3 should reboot as normal like when installing any other FW
Now run eEID Root Key Dumper.pkg
The TV screen goes black & the PS3 sounds off 2 rapid beeps while rebooting
Load MultiMan and press SELECT+START to access MM File Explorer
Copy the eEID Root Key by selecting PS3 Root in the top left corner of MultiMan and going into folder tmp/ (full address is dev_hdd0/tmp/) press O and copy the file to your USB device; now hold the PS button on your controller & exit MultiMan
Plug-in USB device in right most or 2nd USB Port closest to bluray drive and run Memdump
Press X to create a dump of flash memory
Hold the PS button on controller & quit app
The flash is dumped with the file name flash_stor_35500.bin on root of usb device
You should have c2d_GUI if not grab it from up top & unzip it on to your desktop & from your USB device copy over flash_stor_35500.bin & eEID Root Key into folder c2d_GUI.
Install OpenSSL-lite into C: drive and rename the folder to OpenSSL
You can rename this folder during installation or after doesnt matter but it needs to be done in order to run c2d_GUI.exe
Now run c2d_GUI.exe
Choose the flash_stor_35500.bin for input
Choose your output destination & rename it properly:
If 16 MB dump rename it in FLASH-CEX.EID0.NORBIN
If 239/256 MB dump rename it in FLASH-CEX.EID0.NANDBIN
Choose your eEID Root Key
Choose your Target ID so hit the arrow to display a drop down box I'm US/Canada so I picked 84 (all guides are very unclear about this)
Click Covert - I saw a bunch of errors but everything went fine on my end so ignore them.
Guide: Converting from DEX to CEX CFW
If you have not installed the CFW 3.55 w/Retail Patched CoreOS do so now; if you have installed it from the previous guide then do not re-install!
From your PC copy FLASH-CEX.EID0.NORBIN or FLASH-CEX.EID0.NANDBIN over to the root of your USB device & then plug-in to your PS3
Now run MultiMan and from your USB device click X twice on your FLASH-CEX.EID0*
Choose Yes for all options
Ignore the warning about needing to reset your console!
Hold the PS button on controller and exit MultiMan
Now run Reboot.pkg
PS3 should reboot as normal - nothing special going on here
Now run QA Flag (this is not the same one that rebug offeres)
PS3 should sound off 3 rapid beeps while rebooting
This is the tricky part cause if your PS3 doesn't beep then you may brick on the next step If it does not beep after 2 minutes then pull the power cord and plug it back it and power up the PS3 and try QA Flagging again.
Power off the PS3 from the console not the controller.
Copy OFW3.55 over to USB device
Enter Recovery Mode on your PS3
To enter Recovery Mode hold the PS power bottom on the console untill it turns on and then off, then press the power button again untill you hear 2 consecutive beeps and then release.
Choose Option 6 to update PS3 FW and plug-in USB device with OFW3.55
Do not fret if when 1st installing OFW3.55 from the Recovery Menu if the Progress bar sits at 99% it stayed there for what felt like 10mins just grab you a cup of coffee it will finish and you will be able to start the final process of installing OFW 3.55.


this is a copy and paste.
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ERROR: Cannot open [eid_root_key.bin]
ERROR: Cannot open [eid_root_key.bin]
ERROR: Cannot open [eid_root_key.bin]
Wrong format of EID key file: 48 bytes or 256KB expected, but -1 found!