RSS Updated to 20.4.0: emuMMC won’t boot, OFW black screens with SD inserted

GBATEMP

Member
Dec 15, 2024
1,883
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Hey everyone,


I could use your expertise, I’m hitting a wall.
I updated my Switch’s official firmware (OFW) to 20.4.0 without thinking it through, and since then I haven’t been able to access emuMMC at all, it just boots to a black screen.

SYMPTOMS
  • emuMMC: Black screen on boot.
  • CFW (sysMMC): Fatal error on boot. No log is saved; screen shows: 010041544d530000
  • OFW with SD inserted: Boots to the lock screen, then goes black. Initially showed “corrupted data found”; now it just...

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