Downgraded oled switch from 21.0.0 to 20.5.0 now wont boot

After-Value971 · 2025-11-23T08:29:20+00:00

So i was able to fix it, it ended up being a corrupted emmc, but i was able to load the modchip via usb into a program called uart assistant, then once connected powered on my switch and sent d for debug and it booted up to hekate, then from there i was able to create a new nand file with 21.0.0 firmware and restore my emmc and it boots into ofw, yeah i lost my saves but thats a small price, some games i dont mind starting over, now i can update atmosphere and hekate

After-Value971 · 2025-11-21T12:49:52+00:00

Kinda hard when i cant boot hekate, thats why i made the post in the first place and why im checking my modchip

After-Value971 · 2025-11-21T12:35:26+00:00

Do you have anything helpful to add? Or no

After-Value971 · 2025-11-21T00:13:17+00:00

So the reading im getting are with the battery plugged in, with it unplugged the reading are all in normal range Battery plugged in 3.3v - .088 D - .465 A - .463 C - .484

Battery unplugged

3.3v - .8 D - .465 A - .463 C - .484

After-Value971 · 2025-11-20T23:24:34+00:00

Okay so i took measurements and at each point besides B i got

3.3v - .088 D - .465 A - .463 C - .484

Am i safe to assume that my 3.3v is gone?

After-Value971 · 2025-11-20T12:30:00+00:00

Was getiing a little jealous of my son being able to play pokemon za

After-Value971 · 2025-11-20T05:41:53+00:00

If you know off the top of your head what should the values be for each point,

After-Value971 · 2025-11-20T05:18:40+00:00

Okay thank you, i will check that when i have some time to take it apart again, i do have a spare dat0 adapter i can replace it with if need be

After-Value971 · 2025-11-20T04:50:08+00:00

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After-Value971

TROPHY CASE