Hacking Question Help recover switch without BOOT0/BOOT1 backups

simon66

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Hi,
I bought a "broken" switch on eBay (for parts) and to my surprise, it wasn't really broken. The person had AutoRCM enabled without knowing. Once I disabled that, the console (Which was on firmware 5.1.1) would only boot if I had CFW enabled (Atmosphere). Being new to the switch hacking scene, I only backed up the rawnand.bin, tsec_keys.bin and fuses.bin (I didn't dump BOOT0/BOOT1 because I thought it was included in rawnand.bin).

While on Atmosphere, I updated the console to the latest firmware (Im assuming I updated it to either 8.0.0 or 8.0.1). At this point, the console wouldn't even boot up (No nintendo logo or switch logo would appear). It was at this point that I decided to backup BOOT0 and BOOT1 while on this new firmware (I did not backup the rawnand.bin again). Without thinking about it, I flashed the original rawnand.bin back(The 5.1.1 dump) but the console would still not boot up. Reading online, I found a tutorial describing how you can patching your dumps for upgrade/downgrade. I used ChoiDujour to patch the BOOT0/BOOT1 dumps I took while on the new firmware, and I used the 5.1.1 firmware files to patch the dump rawnand.bin dump. I then flashed those files to my Switch and to my surprise, I worked! Kinda. I'm now able to see the Atmosphere logo, but my console wont boot neither on CFW or official firmware.

Sorry for the long story, but my question is as follows:

1) Can I downgrade my BOOT0/BOOT1 dumps from 8.0.0 to 5.1.1?
2) Im an idiot, I know, I should've backed up everything
3) Is this unit still recoverable? I don't know the history on it, but it looks like the NAND might've been touched before I even got this console

Any help would be appreciated :)
 

Napsterae

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Search for manual downgrade with choi on PC. I had the exact problema like you and that helped me.
Use fw 5.1. I tried with 6.1 and that didnt work
 

simon66

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thanks for the link. I tried flashing both BOOT0 and BOOT1 and now it doesn't even show the Atmosphere logo. I don't know if I flashed the wrong file, or it just didn't work.

Search for manual downgrade with choi on PC. I had the exact problema like you and that helped me.
Use fw 5.1. I tried with 6.1 and that didnt work
Thats the link I was following in the first place. There might be something wrong with this unit since Im unable to use memloader (it crashes on any payload I select).


At this point, is it even worth downgrading to 5.1.1? I don't know what to do next :S
 

Philliyxx

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vastrolorde

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Made a new pack.

Wasn`t happy with the other two.

This pack will repair you to 6.2.0... Regardless of fuses burned.
7.0.1 & 8.0.1 included too.

@iriez I pm`d you if you would do the honours for me sir!

This is really great can this fix nxboot error? btw there is a password on the archive on your git.
 

simon66

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Its uploaded to xbins in -

/SWITCH/CFW/_CFW Tools/Unbrick Your Switch Pack/Unbrick_Your_Switch.7z

Thanks for the help :)
I have the file but looks like the lowest firmware it was is 6.2.0 (which is not supported by ChoiDujoir). Going to look around and see how I can manually get this to work on 6.2.0

Im slowly making progress. Looks like this unit might not be a gonner after all.
 
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mattytrog

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I need feedback as to if it is working for people, or how I can streamline the process.
 

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