Scene developer BetterWayElectronics has released a series of updates for his PS4 NOR Validator tool, a tool that help verify the integrity of NOR/Syscon Dumps, and more generally helps with PS4 repairs. Recent releases have added functionality to help with CoreOS Swap Downgrades.
What is PS4 NOR Validator
From the Readme:
This program is for those with the BLOD or ‘blue light of death’ or any other weird issue with their PS4. Using my program can help you determine if its a software or hardware issue. It might sound a bit basic to say that my program just checks what the problem is, but ultimately without it you could be repairing things for no reason and wondering why it isn’t working. This program is designed and catered to other console repair professionals, this is why it is simple and straightforward. If you cannot desolder/reflash your PS4 then you’re doomed. I am happy to say that my program will check every single byte of the flash, either individually as a value or as an area (such as encrypted/filled). Nothing is skipped.
But the new releases do more than that, allowing to actually patch the Syscon dump. This helps, among other things, with a Firmware “downgrade” to the previous installed version (the CoreOS swap that we have described here). It can also be used to enter service mode for the Syscon chip. All of these things require good soldering skills, by the way 
PS4 NOR Validator 2.0.0/2.0.1 – What’s new
2.0.1 (31/1/23)
- Updated Syscon Patcher (Less Manual Patching (Still Beta))
- Significant Updates to UNK, CID, Naming Schemes and Flags
- Added MANU (Manufacturer Mode (Service Mode (Old FW Only)) Mode, Safe Mode, Memory Test, RNG/Keystorage Test, X and O Button Swap & Multi Patches
- Added EAP Reverse Patch (Use If First Fails)
- Better File Handling & Messages.
2.0.0 (20/1/23)
- Added UART Patching To CoreOS/Southbridge Patcher,
- Added Bulk CoreOS/SB Patching (1-4 or 1-2),
- Added Per File Entropy Pursuant To Sony’s File Structure,
- Improved Syscon File Handling,
- Bundled Serial Reader Application (Auto Detects COM Port then Reads & Auto-saves Serial as ASCII (.txt) or Hex (.bin)).
Download PS4 Nor Validator 2.0.1
You can Download the tool from the project’s github here.
Source: BwE
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