Hi EzFlash2, thank you for responding!
Isn't there really anything else I could try before shipping it back?
I saw that there's was a way to to downgrade the firmware on the "standard" omega, there's nothing like that for the definitive edition?
The console is not modded btw, I'm using a Ds Lite and an original GBA
I think this should be a hardware failure, solder joint desoldering related, unless you have a BGA repair tool, I still recommend that you get the warranty.