Hacking Deleted 9.0 FW files off SD after downgrading to 8.1, Switch will now only boot into RCM?

[thewiimang]

I updated to 9.0 but had all sorts of problems so I used ChoiDujour to downgrade to 8.1 FW. Everything went smooth, until I was going through my micro SD and deleted the FW 9.0 folder (I didn't think I needed it anymore) after that I boot into RCM and it freezes at the kosmos logo. I power off the switch and it refuses to boot into OFW. I hold it down for 15 seconds and then try RCM mode and it works. I boot kosmos and it freezes at the logo. I now put fresh kosmos on my SD and deleted the old kosmos files. Now my switch will boot into RCM AND I can access kosmos again. Some of my games are saying corrupt data, but some others are working perfectly fine. I have NO idea what I did I'm guessing this happened from me deleting the FW 9.0 folder. Now I was thinking, do I go to choidujour again and redo the 8.1 update? or should I just wipe my SD and redo kosmos again from the ground up completely? Am I out of luck in booting OFW again? Thanks

 

[pLaYeR^^]

No, you can delete the 9.0.0 firmware folder after you have updated. That can't be the reason for your issue.

 

[linuxares]

How did you downgrade? Did you restore a NAND backup?

You must restore your boot files if you downgrade as well as the nand backup.

 

[thewiimang]

How did you downgrade? Did you restore a NAND backup?

You must restore your boot files if you downgrade as well as the nand backup.

I downgraded with choidujour and the 8.1 FW files. It was running smoothly until I deleted the FW 9.0 folder, and I have a NAND backup I haven't restored yet though.

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No, you can delete the 9.0.0 firmware folder after you have updated. That can't be the reason for your issue.

really? very odd, that's the only major thing to the SD

 

[pLaYeR^^]

You use exFAT?

 

[thewiimang]

You use exFAT?

FAT32 :/

 

[ucef]

if you downgrade you can't boot OFW anymore because your fuses didn't match

 

[thewiimang]

if you downgrade you can't boot OFW anymore because your fuses didn't match

really? I swear I've downgraded once before and my OFW always worked fine.

 

[ucef]

It's not possible tu run 8.1.0 fiiwmre with 9.0 fuses,the bootloader will panic and enter rcm mode as i know !
You need tu upgarde to 9.0 with choidujour et setup a Emmumc with the 8.1.0 firmwire

 

[thewiimang]

It's not possible tu run 8.1.0 fiiwmre with 9.0 fuses,the bootloader will panic and enter rcm mode as i know !
You need tu upgarde to 9.0 with choidujour et setup a Emmumc with the 8.1.0 firmwire

thank you, so I upgrade and how do I set up the emummc? thank you guys again so much

 

[TheCyberQuake]

You should be able to boot into sysNAND 8.1.0 with hekate. 9.0.0 introduced a fuse burn, which once burned will not allow the console to boot without a custom bootloader like hekate/fusee-primary that bypasses the fuse check.

 

[ucef]

thank you, so I upgrade and how do I set up the emummc? thank you guys again so much

 

[TheCyberQuake]

Never use video guides. Can't tell you how many times in the kosmos discord we have to help people because either a bunch of their software is outdated or incorrect methods due to changes overtime.

The regularly updated written guides are much better
https://pubdev.switch.homebrew.guide/hacking/emummc

 

[ucef]

this video is safe,i used it myself

 

[Draxzelex]

this video is safe,i used it myself

Still does not make it safe as not just in the Kosmos Discord, the ReiSwitched Discord also deals with people who either brick or mess up their console by following a video.

 

[Hayato213]

Don't recommend video tutorial here on the forum as they get outdated quick.

 

[thewiimang]

It's not possible tu run 8.1.0 fiiwmre with 9.0 fuses,the bootloader will panic and enter rcm mode as i know !
You need tu upgarde to 9.0 with choidujour et setup a Emmumc with the 8.1.0 firmwire

You should be able to boot into sysNAND 8.1.0 with hekate. 9.0.0 introduced a fuse burn, which once burned will not allow the console to boot without a custom bootloader like hekate/fusee-primary that bypasses the fuse check.

thank you guys so much, I set up my 8.1 emummc and updated to 9.0 and it now boots back into OFW also. thank you again!!!

 

[smf]

really? I swear I've downgraded once before and my OFW always worked fine.

Two reasons for that

1. Some versions of the FW use the same number of fuses, so you may have downgraded to one with the same fuse count.
2. If you always boot a higher fuse count FW into RCM then it never burns them & you can downgrade to any FW that has a matching fuse count to what have actually been burnt

 

[thewiimang]

Two reasons for that

1. Some versions of the FW use the same number of fuses, so you may have downgraded to one with the same fuse count.
2. If you always boot a higher fuse count FW into RCM then it never burns them & you can downgrade to any FW that has a matching fuse count to what have actually been burnt

thank you, I realized this time I was in RCM mode the entire time after I downgraded, I never booted to OFW, once I did it turned blank and it wouldn’t power on. Everything’s great now thanks to you guys!