Update October 17th, 2023 - This method is now outdated as of Atmosphere release v1.6.1.
Atmosphere now automatically corrects the indexer save file causing issues on emmc-rebuilt and syswiped consoles. Thus, if you have trouble with booting into OFW, simply update AMS to 1.6.1 and Hekate to 6.0.7, and boot into SysCFW once. Atmos will correct your OS if issues were found, and OFW will work again. See the update guide, PC method here: https://rentry.org/UpdateCFW#pc-method
Also, see Scires' in-depth explanation of the issue here: https://gist.github.com/SciresM/2ddb708c812ed585c4d99f54e25205ff
OLD Unbrick Guide:
If you cannot boot to OFW after updating to 17.0.0, or face an error with the title id: 0100000000000005 in SysCFW, and you have performed a system wipe or an emmc rebuild in the past, follow the instructions below.
IF, AND ONLY IF your issue is EXACTLY the one described above, you may:
- Inject TegraExplorer, go to "Browse EMMC" > "SYSTEM" > "SAVE" > "8000000000000120"
- Select "Copy to clipboard"
- Go back to the main menu
- Select "Browse SD" > "Clipboard -> Current folder"
- Go back to "Browse EMMC" > "SYSTEM" > "SAVE" > "8000000000000120"
- Select "Delete file"
- Boot sysCFW with Atmosphere 1.6.0 and Hekate 6.0.7 (Important, you need to boot SysCFW at least once after deleting the 00120 save to make OFW work again, since this triggers the system to regenerate and index the missing file.)
Scires' comments regarding this issue
Credits to JeffV @ Nintendo Homebrew Discord for solution.