This thread should have some useful information:
https://gbatemp.net/threads/new-3ds-xl-fuse.416208/
I haven't read the whole thing thoroughly, but I think that people in there had some success in fixing that issue (if I recall correctly, it...
My problem started after putting the battery in backwards (positive pole with the negative). I had the console disassembled because I was trying to fix another problem and accidentally put the battery in the wrong polarity and then it wouldn't...
Caller -"Everytime I start a Pc game on my S24, playing on a external monitor, someone calls or texts me, n it kicks me out of the game." Customer Support - Click (hangs up)
I found it funny cause many many years ago, had a roommate in college that did this same dumbass branding of the school logo, but it didn't look anything like it after it healed. Just looked like a birthmark.