If you are unable to boot your device, please look for the section relevant to you, and follow the instructions. Once a solution works for you, you can proceed on with the main guide
(The section is fairly long, try using Ctrl+F to search for your issue.)
{: .notice--primary}
**If you still cannot solve your issue and need to reach out for help, please paste the contents of all relevant .log files from the root of your SD card into a [Gist](https://gist.github.com/), then come for help prepared with a detailed description of your problem and what you've tried.**
{: .notice--info}
To use the [magnet](https://en.wikipedia.org/wiki/Magnet_URI_scheme) links on this page, you will need a torrent client like [Deluge](http://dev.deluge-torrent.org/wiki/Download)
{: .notice--success}
## <a name="twl_broken" />DSi / DS functionality is broken after completing the guide
#### What you need
* The TWL_FIRM `.cia` for your device
+ <i class="fa fa-magnet" aria-hidden="true" title="This is a magnet link. Use a torrent client to download the file."></i> - [`New_3DS TWL_FIRM - v9936.cia`](magnet:?xt=urn:btih:eab8558c97b18b1f329a2bfcc3c899b84c082a27&dn=New%5F3DS%20TWL%5FFIRM%20-%20v9936.cia&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=http%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=udp%3A%2F%2Fzer0day.ch%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969%2Fannounce&tr=http%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=udp%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=udp%3A%2F%2F9.rarbg.com%3A2710%2Fannounce&tr=udp%3A%2F%2Fp4p.arenabg.com%3A1337%2Fannounce&tr=http%3A%2F%2Fp4p.arenabg.com%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.aletorrenty.pl%3A2710%2Fannounce&tr=http%3A%2F%2Ftracker.aletorrenty.pl%3A2710%2Fannounce&tr=http%3A%2F%2Ftracker1.wasabii.com.tw%3A6969%2Fannounce&tr=http%3A%2F%2Ftracker.baravik.org%3A6970%2Fannounce&tr=http%3A%2F%2Ftracker.tfile.me%2Fannounce&tr=udp%3A%2F%2Ftorrent.gresille.org%3A80%2Fannounce&tr=http%3A%2F%2Ftorrent.gresille.org%2Fannounce&tr=udp%3A%2F%2Ftracker.yoshi210.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.tiny-vps.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.filetracker.pl%3A8089%2Fannounce)
+ <i class="fa fa-magnet" aria-hidden="true" title="This is a magnet link. Use a torrent client to download the file."></i> - [`Old_3DS TWL_FIRM - v8817.cia`](magnet:?xt=urn:btih:17511eadb6e6f3ff22d04f90644e37bd2d96ca43&dn=Old%5F3DS%20TWL%5FFIRM%20-%20v8817.cia&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=http%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=udp%3A%2F%2Fzer0day.ch%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969%2Fannounce&tr=http%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=udp%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=udp%3A%2F%2F9.rarbg.com%3A2710%2Fannounce&tr=udp%3A%2F%2Fp4p.arenabg.com%3A1337%2Fannounce&tr=http%3A%2F%2Fp4p.arenabg.com%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.aletorrenty.pl%3A2710%2Fannounce&tr=http%3A%2F%2Ftracker.aletorrenty.pl%3A2710%2Fannounce&tr=http%3A%2F%2Ftracker1.wasabii.com.tw%3A6969%2Fannounce&tr=http%3A%2F%2Ftracker.baravik.org%3A6970%2Fannounce&tr=http%3A%2F%2Ftracker.tfile.me%2Fannounce&tr=udp%3A%2F%2Ftorrent.gresille.org%3A80%2Fannounce&tr=http%3A%2F%2Ftorrent.gresille.org%2Fannounce&tr=udp%3A%2F%2Ftracker.yoshi210.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.tiny-vps.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.filetracker.pl%3A8089%2Fannounce)
* <i class="fa fa-magnet" aria-hidden="true" title="This is a magnet link. Use a torrent client to download the file."></i> - [`TWL Version Data - v0.cia`](magnet:?xt=urn:btih:4a106681407fede5de95cc8bda635432481f6b5d&dn=TWL%20Version%20Data%20-%20v0.cia&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=http%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=udp%3A%2F%2Fzer0day.ch%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969%2Fannounce&tr=http%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=udp%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=udp%3A%2F%2F9.rarbg.com%3A2710%2Fannounce&tr=udp%3A%2F%2Fp4p.arenabg.com%3A1337%2Fannounce&tr=http%3A%2F%2Fp4p.arenabg.com%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.aletorrenty.pl%3A2710%2Fannounce&tr=http%3A%2F%2Ftracker.aletorrenty.pl%3A2710%2Fannounce&tr=http%3A%2F%2Ftracker1.wasabii.com.tw%3A6969%2Fannounce&tr=http%3A%2F%2Ftracker.baravik.org%3A6970%2Fannounce&tr=http%3A%2F%2Ftracker.tfile.me%2Fannounce&tr=udp%3A%2F%2Ftorrent.gresille.org%3A80%2Fannounce&tr=http%3A%2F%2Ftorrent.gresille.org%2Fannounce&tr=udp%3A%2F%2Ftracker.yoshi210.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.tiny-vps.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.filetracker.pl%3A8089%2Fannounce)
* <i class="fa fa-magnet" aria-hidden="true" title="This is a magnet link. Use a torrent client to download the file."></i> - [`DS Internet - v2048.cia`](magnet:?xt=urn:btih:2b9df8496922f2546dfb0b01220068ce53c19d3d&dn=DS%20Internet%20-%20v2048.cia&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=http%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=udp%3A%2F%2Fzer0day.ch%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969%2Fannounce&tr=http%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=udp%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=udp%3A%2F%2F9.rarbg.com%3A2710%2Fannounce&tr=udp%3A%2F%2Fp4p.arenabg.com%3A1337%2Fannounce&tr=http%3A%2F%2Fp4p.arenabg.com%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.aletorrenty.pl%3A2710%2Fannounce&tr=http%3A%2F%2Ftracker.aletorrenty.pl%3A2710%2Fannounce&tr=http%3A%2F%2Ftracker1.wasabii.com.tw%3A6969%2Fannounce&tr=http%3A%2F%2Ftracker.baravik.org%3A6970%2Fannounce&tr=http%3A%2F%2Ftracker.tfile.me%2Fannounce&tr=udp%3A%2F%2Ftorrent.gresille.org%3A80%2Fannounce&tr=http%3A%2F%2Ftorrent.gresille.org%2Fannounce&tr=udp%3A%2F%2Ftracker.yoshi210.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.tiny-vps.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.filetracker.pl%3A8089%2Fannounce)
* <i class="fa fa-magnet" aria-hidden="true" title="This is a magnet link. Use a torrent client to download the file."></i> - [`DS Download Play - v1024.cia`](magnet:?xt=urn:btih:b581d3c5d98f5e621fddfc1ce5704bb45bf05a8c&dn=DS%20Download%20Play%20-%20v1024.cia&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=http%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=udp%3A%2F%2Fzer0day.ch%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969%2Fannounce&tr=http%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=udp%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=udp%3A%2F%2F9.rarbg.com%3A2710%2Fannounce&tr=udp%3A%2F%2Fp4p.arenabg.com%3A1337%2Fannounce&tr=http%3A%2F%2Fp4p.arenabg.com%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.aletorrenty.pl%3A2710%2Fannounce&tr=http%3A%2F%2Ftracker.aletorrenty.pl%3A2710%2Fannounce&tr=http%3A%2F%2Ftracker1.wasabii.com.tw%3A6969%2Fannounce&tr=http%3A%2F%2Ftracker.baravik.org%3A6970%2Fannounce&tr=http%3A%2F%2Ftracker.tfile.me%2Fannounce&tr=udp%3A%2F%2Ftorrent.gresille.org%3A80%2Fannounce&tr=http%3A%2F%2Ftorrent.gresille.org%2Fannounce&tr=udp%3A%2F%2Ftracker.yoshi210.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.tiny-vps.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.filetracker.pl%3A8089%2Fannounce)
* <i class="fa fa-magnet" aria-hidden="true" title="This is a magnet link. Use a torrent client to download the file."></i> - [`Nintendo DS Cart Whitelist - v11264.cia`](magnet:?xt=urn:btih:7b90d506ad032a581a00035616eaa17a68c48eff&dn=Nintendo%20DS%20Cart%20Whitelist%20-%20v11264.cia&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=http%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=udp%3A%2F%2Fzer0day.ch%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969%2Fannounce&tr=http%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=udp%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=udp%3A%2F%2F9.rarbg.com%3A2710%2Fannounce&tr=udp%3A%2F%2Fp4p.arenabg.com%3A1337%2Fannounce&tr=http%3A%2F%2Fp4p.arenabg.com%3A1337%2Fannounce&tr=udp%3A%2F%2Ftracker.aletorrenty.pl%3A2710%2Fannounce&tr=http%3A%2F%2Ftracker.aletorrenty.pl%3A2710%2Fannounce&tr=http%3A%2F%2Ftracker1.wasabii.com.tw%3A6969%2Fannounce&tr=http%3A%2F%2Ftracker.baravik.org%3A6970%2Fannounce&tr=http%3A%2F%2Ftracker.tfile.me%2Fannounce&tr=udp%3A%2F%2Ftorrent.gresille.org%3A80%2Fannounce&tr=http%3A%2F%2Ftorrent.gresille.org%2Fannounce&tr=udp%3A%2F%2Ftracker.yoshi210.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.tiny-vps.com%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.filetracker.pl%3A8089%2Fannounce)
#### Instructions
##### Section I - Prep Work
1. Create a folder named `cias` on the root of your SD card if it does not already exist
1. Copy `TWL Version Data - v0.cia` to the `/cias/` folder on your SD card
1. Copy `DS Download Play - v1024.cia` to the `/cias/` folder on your SD card
1. Copy `DS Internet - v2048.cia` to the `/cias/` folder on your SD card
1. Copy `Nintendo DS Cart Whitelist - v11264.cia` to the `/cias/` folder on your SD card
1. Copy either `New_3DS TWL_FIRM - v9936.cia` or `Old_3DS TWL_FIRM - v8817.cia` to the `/cias/` folder on your SD card
##### Section II - Installing titles
1. Launch FBI
1. Navigate to `SD` -> `cias`
1. Select "\<current directory>"
1. Select "Install and delete all CIAs"
1. Press (Home) to exit FBI
## <a name="rm_nnid" />Removing an NNID without formatting your device
#### Những gì bạn cần
* The latest release of [GodMode9](https://github.com/d0k3/GodMode9/releases/latest)
#### Hướng dẫn
1. Copy `GodMode9.firm` from the GodMode9 `.zip` to the `/luma/payloads/` folder on your SD card
1. Launch GodMode9 by pressing (A)
1. Navigate to `[1:] SYSNAND CTRNAND` -> `data` -> (32 Character ID) -> `sysdata` -> `00010038`
1. Hold down the (R) trigger, then press (X) on `00000000` to rename this file
1. Press (Up) once to change the name to `10000000`
1. Press (A) to save changes
1. Press (A) to unlock SysNAND writing, then input the key combo given
1. Navigate back to the Main Menu
1. Press (Start) to reboot your device
## <a name="gw_fbi" />Cannot inject H&S on Gateway downgraded device
This is caused by Gateway implementing a very shoddy downgrade method, which leaves two versions of each app on the system. One of them is unused, but it confuses the H&S inject system, causing it to inject into the wrong one.
Note that, on some versions of Luma3DS, the Luma3DS chainloader menu is only displayed if there is more than one payload detected. If there is only one payload detected, holding (Start) on boot will directly launch GodMode9.
{: .notice--info}
1. Boot your device while holding (Start) to launch the Luma3DS chainloader menu
1. Launch GodMode9 by pressing (A)
1. Navigate to `[1:] SYSNAND CTRNAND` -> `title` -> `00040010`
1. Navigate to the folder for your device and region:
+ **Old 3DS EUR**: `00022300` -> `content`
+ **Old 3DS JPN**: `00020300` -> `content`
+ **Old 3DS USA**: `00021300` -> `content`
+ **New 3DS EUR**: `20022300` -> `content`
+ **New 3DS JPN**: `20020300` -> `content`
+ **New 3DS USA**: `20021300` -> `content`
1. Notice that there are two sets of app and tmd files, one set with uppercase extensions (`.TMD` and `.APP`), and one set with lowercase extensions (`.tmd` and `.app`)
1. While holding the (R) trigger, press (Y) to create a new directory
1. Press (A) to confirm the name `newdir` (it does not matter what the folder is called)
1. Press (A) to unlock SysNAND (lvl1) writing, then input the key combo given
1. Press the (L) trigger on each of the uppercase extension files (`.TMD` and `.APP`) to mark them
1. Press (Y) to copy the files
1. Navigate to `newdir`
1. Press (Y) to paste the files
1. Select "Move path(s)"
1. The uppercase extension files will have been moved to the `newdir` directory
1. Press (Start) to reboot your device
1. Return to [Finalizing Setup](finalizing-setup) and retry the FBI injection
1. If this still doesn't work, move the uppercase extension files back to the `content` folder, then move the lowercase extension files to the `newdir` folder, then return to [Finalizing Setup](finalizing-setup) and retry the FBI injection
## <a name="ts_browser" />A browser based exploit is not working
Browser based exploits (such as browserhax or 2xrsa) are often unstable and crash frequently, but they can sometimes be fixed by doing the following steps
1. Launch the browser, then launch the browser settings
1. Scroll to the bottom and Initialize Savedata (it also may be called Clear All Save Data)
1. Try the exploit again
## <a name="ts_sys_down" />Black screen on SysNAND boot
1. Try booting with your SD card out, and then reinserting it after booting
1. Power off your device
1. Remove your SD card from your device
1. Power on your device
1. When the home menu appears, reinsert your SD card into your device
1. If this worked, you should clear Home Menu's extdata by navigating to the following folder on your SD card: `/Nintendo 3DS/(32 Character ID)/(32 Character ID)/extdata/00000000/`
+ EUR Region: Delete `00000098`
+ JPN Region: Delete `00000082`
+ USA Region: Delete `0000008f`
+ CHN Region: Delete `000000A1`
+ KOR Region: Delete `000000A9`
+ TWN Region: Delete `000000B1`
1. Try booting without any cartridges inserted (including flashcarts)
1. If you have a hardmod and a NAND backup, flash the backup back to SysNAND
1. Try booting into recovery mode and updating your system
*This probably will not work for an Old 3DS downgraded to 2.1.0*
**This will BRICK a New 3DS downgraded to 2.1.0**
1. Power off your device
1. Hold (L) + (R) + (A) + (Up)
1. Power on your device
1. If you enter safe mode, update your device *only if you have an entrypoint for the latest FW version and it is possible to downgrade from it* and attempt the downgrade again.
1. Your device may be bricked. For support, ask for help at [Nintendo Homebrew on Discord](https://discord.gg/MWxPgEp)
## <a name="ts_sys_b9s" />Black screen on SysNAND boot after Installing boot9strap
1. Ensure you have a working payload.
1. Check for the existence of `boot.firm` in the root of your SD card.
1. Try resetting Luma's config and fix options
1. Delete `/luma/config.bin` from your SD card
1. Set your options when it boots
1. Test booting GodMode9
1. On Luma3DS, hold (Start) on boot
1. Try deleting home menu's extdata
1. Clear Home Menu's extdata by navigating to the following folder on your SD card: `/Nintendo 3DS/(32 Character ID)/(32 Character ID)/extdata/00000000/`
+ EUR Region: Delete `00000098`
+ JPN Region: Delete `00000082`
+ USA Region: Delete `0000008f`
+ CHN Region: Delete `000000A1`
+ KOR Region: Delete `000000A9`
+ TWN Region: Delete `000000B1`
1. Try booting without any cartridges inserted (including flashcarts)
1. If you previously downgraded with Gateway, ensure that you are using the latest Luma3DS version (v6.2.3 or higher, at the least)
1. If your NAND is of a version between 3.0.0 and 4.5.0, do the following:
+ Ensure that you are using the latest Luma3DS version (v6.6 or higher, at the least)
+ Download [this file](http://nus.cdn.c.shop.nintendowifi.net/ccs/download/0004013800000002/00000056) and rename it to `firmware.bin`
+ Copy `firmware.bin` and `cetk` to the `/luma/` folder on your SD card
+ Delete both of these files after updating your device
1. Try following [9.2.0 CTRTransfer](9.2.0-ctrtransfer)
1. Ask for help at [Nintendo Homebrew on Discord](https://discord.gg/MWxPgEp).
## <a name="ts_transfer" />Error during SafeB9SInstaller
If an error occurs during the SafeB9SInstaller process, you will be prompted to launch an external payload for the purpose of repairing your device.
#### Những gì bạn cần
* The latest release of [GodMode9](https://github.com/d0k3/GodMode9/releases/latest)
#### Hướng dẫn
1. Select "Unmount SD card"
1. Insert your SD card into your computer
1. Copy `GodMode9.bin` from the GodMode9 `.zip` to the `/boot9strap/` folder on your SD card and rename `GodMode9.bin` in `/boot9strap/` to `payload.bin`
1. Reinsert your SD card into your device
1. Select "Run 0:/CTRTransfer/payload.bin"
1. If it was successful, you will have entered GodMode9
1. Navigate to `[0:] SDCARD` -> `boot9strap`
1. Press the (L) trigger on `firm0firm1.bak` and `sector0x96.bak` to mark them
