Hacking Fuse Burning on emuMMC and Firmware update?

lucky13 · Mar 15, 2020

So I have just updated to firmware 9.1 from 8.1 using ChoiDujourNX and as part of the install it mentions I am burning a fuse because I don't use AutoRCM.....my question is is it burning a real fuse on the Switches NAND or just an emulated nand fuse on the SD card ?

I also cloned the sd card onto another sd card when it was on Firmware 8.1 can I pop the SD card back in and essentially downgrade the Switch to 8.1 without any issues ?

thanks

thesjaakspoiler · Mar 16, 2020

The fuses are in your Tegra CPU, not your NAND or SD card.
So if you burn them, it affects everything.
If you plan on using a lower firmware, then don't burn them.

pLaYeR^^ · Mar 16, 2020

You can‘t burn fuses with EmuMMC since you can’t boot with official bootloader to EmuMMC.

lucky13 · Mar 19, 2020

Sorry so which reply is correct ..yes a fuse is burnt or not ?

thanks

pLaYeR^^ · Mar 19, 2020

lucky13 said:
Sorry so which reply is correct ..yes a fuse is burnt or not ?

thanks

No fuse burnt with EmuMMC.

lucky13 · Mar 19, 2020

pLaYeR^^ said:
No fuse burnt with EmuMMC.

great thanks so I can role back to my 8.1 firmware if for some wierd reason I need too

pLaYeR^^ · Mar 20, 2020

lucky13 said:
great thanks so I can role back to my 8.1 firmware if for some wierd reason I need too

Yes.

LeMageFro · Mar 20, 2020

You can check your fuse count with hekate so you'll know for sure.

pcwizard7 · Mar 20, 2020

the fuses get burnt at boot so when you update your switch it will reboot and try to boot. If you update the sysnand it will also update the boot 1/2 as well so autorcm will be overwritten.

if you update the sysnand you can beat the reboot and push a payload before it can boot it will stop the burnt fuse but if ur not confident I wouldn't do it as u have one shot at it

Hacking Fuse Burning on emuMMC and Firmware update?

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