[SWITCH RCM] Semi-brick error 2002-4686 after failed NSP install

Hello all,

TL/DR: Switch V1 RCM that was running SXOS semi-bricked after a "seemingly successful" NSP install, and gives me the error 2002-4686. Tried updating online, rebuilding the MMC, downgrading to 9.2.0 with no success.
Please, read below for an in depth explanation!.

I have a Switch V1 RCM that was running SXOS and semi-bricked after a "seemingly successful" NSP install.
I have it giving me the error screen 2002-4686 right after the Switch logo screen.
Researching a bit I found this error could be tied to either microSD failure or something related to a game cart being inserted. None of this seems to be the culprit since I can use (boot Hekate and browse the files in it) and the later not having any cart inserted.

Things I have tried so far:
1) Updated online using the +- recovery menu
2) Completely rebuilt the eMMC structure using this guide: https://suchmememanyskill.github.io/guides/unbrick/#mmc-rebuild
3) Downgraded to 9.2.0 using this guide: https://gbatemp.net/threads/how-to-...nofficially-without-burning-any-fuses.507461/
4) Updated online using the +- recovery menu (after everything was attempted)

Things I noticed:
1) During the downgrade from 11.0.1 to 9.2.0, when mounting the 29GB eMMC partition HacDiskMopunt was accusing the GPT to be corrupted (I fixed using SX OS Fix GPT)
2) During the downgrade from 11.0.1 to 9.2.0, at the vary last step of passing the USER files to the partition, I could not mount it properly, even though the HacDiskMount was green when testing the key.
3) The error stayed the same after the downgrade with the only difference being the version (was 11.0.1 and now is 9.2.0 )

Is there anything else I could try?

Any tips are welcome!

Thanks!

 

This is a customer's console and he didn't take any NAND backup :/
I have previously tried a different known good SD with a fresh copy of Atm with no success as well.

 

Yup, I saw... I even experienced a weird issue related to my USER partition when downgrading.
But I didn't see any means to fix this. Is there any way to recreate this partition?

 

HacDIskMount was not mounting my USER partition. Actually it mounts but Windows cannot "understand it". Even though the keys are good and green when I test them. Any tips?

For sure, man!
I always have a working copy of all my Switch NANDs locally and on a cloud. Also, I always encourage people to to do it but this one have not talked to me before