Hacking Switch does not boot into ofw

sefki21 · Feb 15, 2019

Hi Guys

Wanted to downgrade my switch from 7.0.0 to 6.2.0 after my son upgraded it and during dumping the old boot1 it somehow failed and blank screen came up.

Did it via SXOS Dongle. Now it does not boot - only way is booting into SXOS.

How can I restore the firmware? Is there any way to rebuild boot0/boot1 and dump it again to the switch?

Kubas_inko · Feb 15, 2019

You need to bypass fuse check, as you now have firmware which requires fewer fuses then the 7.0.0. So try booting to stock FW via the stock option in sx os or via hekate.

bluem6 · Feb 17, 2019

I think I have the same issue, total noob...now the only way it boot is using hekate then loading the ofw or cf. That's after restoring the nand...

sefki21 · Feb 17, 2019

Nope, wasn‘t this with my switch - somehow my boot0 got corrupt. was able to resolve it by creating new boot0 via ChoiDujour and flash it via etcher.

Lacius · Feb 17, 2019

bluem6 said:
I think I have the same issue, total noob...now the only way it boot is using hekate then loading the ofw or cf. That's after restoring the nand...

How many fuses do you have burnt (check with Hekate), and which system version are you on?

bluem6 · Feb 18, 2019

Lacius,

9 burnt fuses, running hekate 4.6, 6.2 firmware with atmosphere. Any suggestion?

chippy · Feb 18, 2019

bluem6 said:
9 burnt fuses,

That's OS 7.0. You will need to boot ofw throu hekate and select boot ofw. You can't boot normaly to 6.2 with 9 burnt fueses

bluem6 · Feb 19, 2019

Yep, that's exactly what I have to do each time...now I know why, thank you very much. Just curious, how do you relate "burn fuses" to OS version?

Kubas_inko · Feb 19, 2019

bluem6 said:
Yep, that's exactly what I have to do each time...now I know why, thank you very much. Just curious, how do you relate "burn fuses" to OS version?

Every major update, they just tell the switch to burn another fuse. And we can check how many fuses are required for every update.

chippy · Feb 19, 2019

bluem6 said:
how do you relate "burn fuses" to OS version?

I googled it and found a switch wiki saying what fuse count is what os

ELY_M · Feb 19, 2019

yes, you cant boot normally with that many burnt fuses. it goes in panic.

Hacking Switch does not boot into ofw

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