If you are unable to boot your 3DS, 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}
## <a name="twl_broken" />DSi / DS functionality is broken after completing the guide
* [`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)
* [`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)
* [`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)
1. Copy `GodMode9.bin` from the GodMode9 `.zip` to the `/luma/payloads/` folder on your SD card and rename `GodMode9.bin` in `/luma/payloads/` to `up_GodMode9.bin`
## <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 Decrypt9, causing it to inject into the wrong one.
#### What you need
* The latest release of [GodMode9](https://github.com/d0k3/GodMode9/releases/)
1. Copy `GodMode9.bin` from the GodMode9 `.zip` to the `/luma/payloads/` folder on your SD card and rename `GodMode9.bin` in `/luma/payloads/` to `up_GodMode9.bin`
6. 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`)
7. While holding the (R) trigger, press (Y) to create a new directory
8. Press (A) to confirm the name `newdir` (it doesn't matter what it's called)
9. Press (A) to unlock SysNAND writing, then input the key combo given
10. Press the (L) trigger on each of the uppercase extension files (`.TMD` and `.APP`) to mark them
11. Press (Y) to copy the files
12. Navigate to `newdir`
13. Press (Y) to paste the files
14. Select "Move path(s)"
15. The uppercase extension files will have been moved to the `newdir` directory
16. Press (Start) to reboot
17. Return to [Installing arm9loaderhax](installing-arm9loaderhax) and retry the FBI injection
18. 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 [Installing arm9loaderhax](installing-arm9loaderhax) 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. Open the browser, then open the browser settings
You copied the wrong `arm9loaderhax.bin` file to your SD card (you were only supposed to copy the `3ds` folder and `SafeA9LHInstaller.dat` file from the SafeA9LHInstaller zip)
4. On **the source 3DS**, do the the save (and `.app` if you are using the `.app` page) injection steps
5. On **the source 3DS**, go to System Settings, "Data Management", "DSiWare", then copy your DSiWare game to your SD card
6. Either put **the source 3DS**'s SD card in **the target 3DS**, or rename the `Nintendo 3DS` on **the target 3DS**'s SD card and copy the `Nintendo 3DS` folder from **the source 3DS**'s SD card to **the target 3DS**'s SD card
7. On **the target 3DS**, go to System Settings, "Data Management", "DSiWare", then copy your DSiWare game to the system
8. Return your SD cards to normal, then continue with the DSiWare Downgrade
4. Try backing up your SD card files, then formatting it and copying them back
5. Try a different SD card
## <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 3DS by holding down the power button.
2. Take out the SD card.
3. Power on the 3DS.
4. When the home menu appears, reinsert your SD card.
5. 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/`
*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 3DS by holding down the power button.
2. Hold L+R+A+Up.
3. Power on the 3DS.
4. If you enter safe mode, update your 3DS *only if you have an entrypoint for the latest FW version and it is possible to downgrade from it* and attempt the downgrade again.
5. Your 3DS may be bricked. For support, ask for help at [#3dshacks on Rizon IRC](https://www.reddit.com/r/3dshacks/wiki/irc) or [3DS Hacking on Discord](https://discord.gg/MWxPgEp).
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`
+ KOR Region: Delete `000000A9`
5. Try booting without any cartridges inserted (including flashcarts)
