Can you brick your 3ds uninstalling custom firmware if the safety checks work?

[AmongPro6800]

So I recently Modded my Nintendo 2DS, but it has been unstable, randomly crashing every now and then on homebrew titles, games, and even the home menu(I don't have any custom themes). I thought about Uninstalling CFW, But it doesn't sound very safe. I was wondering if the safety checks say i can uninstall cfw, could it still brick in the process?

 

[SylverReZ]

So I recently Modded my Nintendo 2DS, but it has been unstable, randomly crashing every now and then on homebrew titles, games, and even the home menu(I don't have any custom themes). I thought about Uninstalling CFW, But it doesn't sound very safe. I was wondering if the safety checks say i can uninstall cfw, could it still brick in the process?

Why do you really want to remove CFW? Just restore a NAND backup.

 

[AmongPro6800]

Honestly, I just assumed it would stay modded when I restored a NAND Backup. I don't really know what a NAND Restore does though.

 

[a_username_that_isnt_cool]

Honestly, I just assumed it would stay modded when I restored a NAND Backup. I don't really know what a NAND Restore does though.

NAND Restoration is similar to a System Restore from Windows.

 

[AmongPro6800]

So If i reload the nand backup it'll set it back to when it didn't have cfw?

 

[lone_wolf323]

So If i reload the nand backup it'll set it back to when it didn't have cfw?

it will still have cfw. ya cant make or use Nand backups without cfw. Removing cfw will not help. it will only cut off troubleshooting measures that will require you to put cfw back on.

 

[AmongPro6800]

Ok, I'll restore a nand backup. One thing though, I'm not sure which file is the nand backup. I have 3 files.

1. 230209_AW71471586_sysnand_00.bin
2. 230209_AW71471586_sysnand_00.bin.sha
3. essential.exefs

I'm not sure which one it is.
Or maybe it's all of them

 

[Kwyjor]

but it has been unstable, randomly crashing every now and then on homebrew titles, games, and even the home menu(I don't have any custom themes).

Units do not somehow spontaneously "become unstable" and uninstalling CFW will probably not help anything. If anything, it will make things worse.

The most likely explanation is that your SD card is failing, as that happens all too frequently. Plug your SD card into your PC, copy everything off (preferably with Roadkil's Unstoppable Copier), format the card, test the empty card with h2testw, and then copy everything back if the test is okay. If the test fails, you will need a new SD card.

Sometimes just copying everything off and back again will fix problems.

Don't bother considering a NAND backup without doing this first.

 

[AmongPro6800]

I just remembered something that could explain this issue. I got my 2DS used, and when I got it, the SD slot was broken, and it displayed the sd was always write protected. So I made a stupid decision and poked around the slot with a bent paper clip, and the slot actually started working. I can see now that might not have been such a good idea though. The slot might be bugging out randomly, and that's why it crashes.

 

[AmongPro6800]

But seriously, would uninstalling cfw brick the system if the safety checks work? I already know everyone says it's a bad idea, but nobody actually said.

 

[Ryab]

But seriously, would uninstalling cfw brick the system if the safety checks work? I already know everyone says it's a bad idea, but nobody actually said.

There is a 99% chance the SD cart/SD Card slot is the source of the instability.

 

[AmongPro6800]

ok, that makes a lot of sense. What can I do about it though?

 

[KleinesSinchen]

ok, that makes a lot of sense. What can I do about it though?

Replace the SD reader? It is soldering work on 2DS models and old 3DS XL.

As for the initial question:
No, following https://3ds.hacks.guide/uninstall-cfw won't lead to a brick when all tests have good results (especially starting native firm without patches)
https://3ds.hacks.guide/uninstall-cfw#section-iii---safety-test

Removing CFW will not get rid of the problems.

 

[AmongPro6800]

Replace the SD reader? It is soldering work on 2DS models and old 3DS XL.

As for the initial question:
No, following https://3ds.hacks.guide/uninstall-cfw won't lead to a brick when all tests have good results (especially starting native firm without patches)
https://3ds.hacks.guide/uninstall-cfw#section-iii---safety-test

Removing CFW will not get rid of the problems.

I opened up my ds and shot some compressed air at the reader, and that seems to have fixed it. also thanks for the answer!

 

[Kwyjor]

would uninstalling cfw brick the system if the safety checks work?

If you try to restore an old NAND backup from a faulty SD card that stops responding halfway through, then it probably won't brick your system (almost nothing will), but it's not going to be especially easy to recover from either. But then, uninstalling doesn't require restoring an old NAND backup either.

Limitations of the safety test are discussed here:
https://gbatemp.net/threads/about-removing-b9s-and-the-safety-test.541718/

I opened up my ds and shot some compressed air at the reader, and that seems to have fixed it.

You should probably test your SD card as discussed in my previous post anyway. The FAT32 filesystem is very susceptible to corruption.