No, just, no.[…]
If you delete the contents of the TWLNAND and then edit twlmbr.bin, then you will have a BSOD that can only be fixed by a hardmod.
- This can be fixed with a hardmod – if a full backup image exists.
- If can be fixed with ntrboot (even without a backup to some degree).
Repairing (software based) 8046 BOOTROM ERROR should only be done with software methods (ntrboot).
Ntrboot method has been practically confirmed (beyond the theory) working for:
- Deleting all files from CTRNAND, TWLN with GodMode9 and removing B9S afterwards (booting to black screens)
- Overwriting twlmbr.bin with garbage data (showing 8046 BOOTROM ERROR)
- Overwriting FIRM0 and FIRM1 with garbage data (showing 8046 BOOTROM ERROR) → I did this one myself.
- Overwriting the complete NAND with garbage data (showing 8046 BOOTROM ERROR)