(adsbygoogle = window.adsbygoogle || []).push({}); Hello peeps,for those of you who encounter RSOD while on DEX this fixes the RSOD.
I Got a PS3 with RSOD while on PS3ITA 4.50 DEX and tested this method and it worked.

DISCLAIMER
You're doing this at your risk!! I wont take any responsibility of any damage to your console. I tried this and it worked with me.

Needed Stuff
1. Rebug's 4.46 D-REX PUP
2. DEX Downgrader (Rogero's DEX Downgrader v2 in my case)
3. ITSKAMEL'S 3.55 DEX PUP
4. Rogero Downgrader RSOD PUP
4. PUAD GUI
5. A Vaild CEX flash dump
6. Download this file (it will enable the RSOD bypass on DEX) : You must login or register to view this content.
7. The rsodfix.gnpdrm.pkg

Steps
1. Put the DEX Downgrader on a flash drive
2. Open PS3 and access the recovery menu and go to System Update then plug in the flash drive to the PS3 and install the update
3. Now the PS3 will open but will still have RSOD but thats OK, Put ITSKAMEL'S 3.55 DEX PUP in the flash drive
4. Access the recovery menu again and go to system update,then plug in the flash drive to the PS3 and install the update
5. After the update is done you will still have RSOD which is normal for now
6. Go back to your PC and make a new folder where ever you like then open PUAD GUI and go to the repacker tab
7. As for the pup file input, Browse to the Rebug 4.46 D-REX PUP.For the output folder just select the folder you have made earlier
8. The blue buttons below Options should be lit now,If so press the DEV_FLASH and the SPKG buttons
9. as for the firmware Select Firmware 4.XX and hit the Green Start Button on the bottom
10. After the unpacking is done leave the program open and go to the output folder,you will see alot of things and it should look like this [ATTACH=CONFIG]32322[/ATTACH]
11. Now navigate to update_files/dev_flash_012.tar.aa.2013_06_20_055817.folder\dev_flash\vsh\module
12. Copy the basic_plugins.sprx you have downloaded and paste it in the module folder. Overwrite the file when it prompts.
13. Go Back to the PAUD GUI we left open and press the green repack button on the bottom
14. In the output folder you'll find a PUP, this PUP is a REBUG 4.46 D-REX with RSOD Bypass to allow us to access XMB
15. Put the New PUP in the flash drive and open the recovery menu and choose system update and install the new pup
16. After the installation is done,you'll boot to XMB just fine.Now go to package manager and install the REBUG Toolbox from HDD
17. Make sure that you have your CEX Dump in the flash drive and make sure that the flash drive is in the dev_usb000 port which is the closest USB port to the power button
18. Go to the CEX/DEX list and Rewrite the Target ID to CEX and it'll say that LV2 is swapped to CEX too
19. Put the Rogero Downgrader RSOD PUP and the rsodfix.gnpdrm.pkg on the flash drive and you'll be able to update from XMB just fine.
20. After the installation is done it should boot up the Rogero downgrader CFW, now go to install PKG file and install the rsodfix.gnpdrm.pkg and run it
21. If successful you should hear a peep.and with that the RSOD is fixed and you can install the CFW of your choice now

Enjoy!


Credits to:
formobicho from ps3pirata for the guide
Me for rewriting the guide

thanks ya kwaity tslm

Can't you just add the basic plugins file to 4.50 ITA and just use that firmware with RSOD bypass?

For those of you that cant find PUAD GUI 1.5 spent like 3hours looking for it but it should be in here You must login or register to view this content.
Its 1+ gB because theres other tools and etc in there but its worth it lol

Got to step 15, and then when i installed the new pup i got a black screen

i downgraded by using rogero 3.55 and when it got to 21% it gave me error so i turned ps3 of and back on and i just keeps popping up with the installing screen and gives error on 21%

You are a god my friend every other way I tried failed but this method worked. Only issue I had was I did run the program as administrator in windows and caused it not to unpack the pup.

Cheers!

Way to complicated & has more of a potential to brick, ive fixed my old fat CECH-L03 3 times from RSOD

200 series slims & CECH-L0?, CECH-M0? & CECH-K0? are prone to RSOD as they can easily get corrupt VTRM sectors in the nor bios chip.

All I've ever done is install DEX downgrager, (you will still be RSOD) then install Rebug 4.65.2 D-REX, it has RSOD bypass so you can boot.

Then simply install & run RSoD Fix PKG for all CFW to fix

Depending on the severity of the corruption 3.55 downgrader might not be possible. I've encountered RSOD on a couple consoles now and I had one were the simple way was not working. I had to go about it this so called complex way in which yes it's a lot of downloading but on the computer you press 5 buttons in total. Which is not overly complex in my eyes. Long story short if the simple method doesn't work do the complex and your good to go!
Cheers all

I did exactly what you did and fixed my RSOD. Thank you!