Today, for the very first time i got this problem.
I did a DSIwareHax systransfer.
I did downgrade NFIRM everything OK! 0 ERROR.
Tried to downgrade and Can't get AM:U Service!!! something like that.
So i opened 3DSident. And nFirm was 2.52
Tried again and again to Downgrade NFIRM. But didnt works.
So What happen!!
1. When i tried to run nfirm downgrade first time after systransfer, the screen goes black, and return to power of console option.
2. Before run nfirm downgrade i did a FULL NAND backup
3. I restored the FULL NAND backup and tried again and this time works. nfirm 2.50
Something was wrong due to nfirm downgrade, a NAND restore solved the problem.
So it's alot of important to do FULL NAND backup before do anything.
Use https://github.com/Plailect/dgTool/releases/tag/v2.0.0
And DUMP NAND before start nfirm Downgrade!!
I did a DSIwareHax systransfer.
I did downgrade NFIRM everything OK! 0 ERROR.
Tried to downgrade and Can't get AM:U Service!!! something like that.
So i opened 3DSident. And nFirm was 2.52
Tried again and again to Downgrade NFIRM. But didnt works.
So What happen!!
1. When i tried to run nfirm downgrade first time after systransfer, the screen goes black, and return to power of console option.
2. Before run nfirm downgrade i did a FULL NAND backup
3. I restored the FULL NAND backup and tried again and this time works. nfirm 2.50
Something was wrong due to nfirm downgrade, a NAND restore solved the problem.
So it's alot of important to do FULL NAND backup before do anything.
Use https://github.com/Plailect/dgTool/releases/tag/v2.0.0
And DUMP NAND before start nfirm Downgrade!!