Cant boot into stock after downgrade.

autist · 2026-06-09T17:10:56+0100

So recently tried to downgrade my switch, but now it wont boot into stock, giving me an error 2002-0001. CFW works perfectly fine.

SSmiles · 2026-06-09T18:15:00+0100

I had this issue too, simply downgrading to a lower firmware still keeps information from the other firmware. I had to factory reset it in the safe menu to get it working

thesjaakspoiler · 2026-06-10T00:45:22+0100

What is your fuse count (check in Hekate).
The CFW ignores the downgrade protection based on the fuse count.
The OFW does check it and refuse to boot in case there is a mismatch.

SSmiles · 2026-06-10T16:19:28+0100

thesjaakspoiler said:
What is your fuse count (check in Hekate).
The CFW ignores the downgrade protection based on the fuse count.
The OFW does check it and refuse to boot in case there is a mismatch.

Yeah he's right, my issue was in custom firmware which doesn't care about fuses. OFW does care, fuses are actually being burnt in the switch so it's unrecoverable. . .our advice to you, keep the updated firmware and start using emuNAND

Cant boot into stock after downgrade.

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