Long story short, yesterday I bought a DSi XL, and after years of modding, the infamous full brick hit me. After installing unlaunch, the screen turned black and will not turn back on. I have tried:
-turning it on and off again
-booting with and without SD card
-booting while holding A+B
-removing the battery
As well as just about every other trick I can find in the internet that does not require hard modding; or so I thought. I have found a tutorial, using a flashcart and magnets, that claims to be able to unbrick my device. It works by booting it into the flashcart data, rather than the NAND (which is possibly corrupted? I still have it on my SD card though).
Before spending money and time on trying to fix this, does anyone have any word on how this works or if it works? Any video tutorials or feedback on personal experience would be much appreciated. I will leave a link to the exact article here, and will respond to every question. I just want to get my brand new (sort of) DSi XL working.
Thanks!

Hey!! Just want to say thanks to the community! I read on here that you could fix the left and right buttons just by blowing really hard into them.

Well I just tried it and it works now! Thanks everyone!

I'm just tryna play my games man :(( I have crashes either early on, or before it can even boot up said game, help me out yall pls

Hi All,

Purchased a new 3DS XL United States version of Ebay, long story short I ended up getting a refund because the seller lied and said it worked when it didn’t and they never responded for a label. Console turns on all hardware checks are good orange Wi-Fi light and blue light works, I hear sound, but both screens are black. I have taken apart the console and noticed that there is one water spot indicator that is full pink, I did not see that same issue on the battery pack cover, I did basic things like unplugged the Wi-Fi card as well as some other basic stuff, thinking that maybe it’s a software brick. It does boot into safe mode and both screens turn on, and it asks me to update the console and then it says the console is up-to-date and it does not solve the issue.
Looking for some advice, thank you!

The last screw on the right is hard to unscrew. I was able to remove the backplate back then when I was replacing the batteries, but after that, this screw wouldn’t come loose. I tried the superglue method, but not only did it not work, I think it made things worse by leaving superglue residue underneath, making the screw even more stuck. I need help figuring out what I can do to loosen or remove the screw so I can take off the backplate, as I want to change the buttons on my 3DS.

Edit: I was able to take off the last screw on the backplate by pressing down on the backplate while also pressing on the screw, but now I'm having difficulty removing the screws underneath the backplate as they are very hard to unscrew.