I think I bricked my 3ds while trying to jailbreak it using sound hax 2 years I missed a step while downgrading the firmware and the screen started stretching and I tried
HOW TO DOWNGRADE 3DS | KASKUS
Tutorial: Downgrade your Nintendo 3DS from Version 10.3 to 9.2! - YouTube
Witcher 3 Mod Downgrades Graphics to Look Like 3DS Game - GameSpot
3DS] How To Downgrade Firmware To 4.x (No Flashcart!) - YouTube
Downgrade your 3DS to 9.2.0 | Code Donut
3DS: Is sysUpdater 0.4.2b worth it to downgrade?? - Hackinformer
Marketing the 3DS: Great Success and Great Failure - Zelda Dungeon
Simple Guide to Downgrading your 3DS | GBAtemp.net - The Independent Video Game Community
Nintendo 3ds Mod Downgrade Service | ClickBD
GameStation - NINTENDO 3DS CFW SERVICES ALL FIRMWARE ARE SUPPORTED OLD 3DS regular, OLD 3DS XL, 2DS, NEW 3DS NEW 3DS XL DOWNGRADE from 9.3-10.3 as of now currently supported AUTO BOOT
The Guide's official DSiWare firmware downgrade page (downgrade 11.0.0 without a hardmod!) : r/3dshacks
Attempted downgrade, 3DS can't open home menu. Advice? : r/3dshacks
How to Downgrade 3DS to 9.2: Made Easy - YouTube
Firmware version 1.0.0 on a new 3ds :) (the new 3ds shipping with ver. 9.0.0) : r/3DS
3DS: Downgrading to FW9.2 Tutorial - Hackinformer
3DS downgrade from 10.4/10.5/10.6 is now possible - Wololo.net
3DS: System Software Downgrade Tutorial (Updated!) - Wololo.net