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- How to Uninstall A9LH
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- Method 1: Restoring NAND Backup
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- This method requires having your original NAND backup made BEFORE you installed A9LH. If you do not have this backup, use Method 2. This guide assumes you have Luma3DS and named your NAND backup "NANDmin.bin", but can be done with any CFW and backup name. If you already know how to chainload Decrypt9, skip to step 4, but you may want to do the initial optional steps first.
- 01. (OPTIONAL) Launch FBI from the HOME Menu
- 02. (OPTIONAL) Navigate to CTRNAND and press A
- 03. (OPTIONAL) Delete arm9loaderhax.bin and config.bin by pressing A on each file and pressing A on "Delete"
- 1. Download the latest release of Decrypt9WIP (https://github.com/d0k3/Decrypt9WIP/releases)
- 2. Take Decrypt9WIP.bin from the downloaded zip and place it in SD:/luma/payloads/
- 3. Rename Decrypt9WIP.bin to X_Decrypt9WIP.bin
- 4. Create a folder named files9 on the root of your SD card if it doesn't exist already
- 5. If your original NANDmin.bin and NANDmin.bin.sha files are not in SD:/files9/, put them in now
- 6. Reinsert your SD card into your 3DS
- 7. Hold X while you power on your 3DS to boot into Decrypt9
- 8. Select "SysNAND Options"
- 9. Select "SysNAND Backup/Restore"
- 10. Select "NAND Restore" (do NOT select "NAND Restore (keep a9lh)" or you will not uninstall a9lh)
- 11. Confirm writing to the NAND by inputting the button combination
- 12. Press A to choose NANDmin.bin
- 13. When the process finishes, press Start to reboot your 3DS. A9LH will have been uninstalled and you will be returned to the point before downgrading to 2.1.0.
- (OPTIONAL - These steps will remove most traces of CFW from your 3DS)
- 14. Go into System Settings from the HOME Menu
- 15. Tap on "Other Settings"
- 16. Go to the last page and tap "Format System Memory"
- 17. Confirm the System Format by tapping the red button
- 18. Once the format has completed, remove your SD card from your 3DS
- 19. Delete any files and folders that are not /Nintendo 3DS/ and /DCIM/
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- Method 2: SafeA9LHInstaller
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- This method doesn't have any requirements, and is easier in my opinion. This guide assumes you have SD-less Luma3DS installed, but you can skip the optional steps if you don't.
- 01. (OPTIONAL) Launch FBI from the HOME Menu
- 02. (OPTIONAL) Navigate to CTRNAND and press A
- 03. (OPTIONAL) Delete arm9loaderhax.bin and config.bin by pressing A on each file and pressing A on "Delete"
- 1. Download the latest release of SafeA9LHInstaller (https://github.com/AuroraWright/SafeA9LHInstaller/releases)
- 2. Take arm9loaderhax.bin from the downloaded zip and place it in the root of your SD card, replacing the original arm9loaderhax.bin
- 3. Reinsert your SD card into your 3DS
- 4. Turn on your 3DS to boot into SafeA9LHInstaller
- 5. Press Start to uninstall A9LH
- 6. Confirm the uninstallation
- 7. Press any button to reboot
- (OPTIONAL - These steps will remove most traces of CFW from your 3DS)
- 8. Go into System Settings from the HOME Menu
- 9. Tap on "Other Settings"
- 10. Go to the last page and tap "Format System Memory"
- 11. Confirm the System Format by tapping the red button
- 12. Once the format has completed, remove your SD card from your 3DS
- 13. Delete any files and folders that are not /Nintendo 3DS/ and /DCIM/
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