No, but don't worry about it, i have a 3DS i can play with, sometime i'll get it working perhaps, no rush. Is okay, no need to be concerned, i know how you felt when you had that water and rice accidnt.
This morning...my 3ds XL got stuck at a black screen after the splash screen for a few times apparently because of the DS game in the slot or something like that...It booted fine when I took it off...you don't happen to have a DS game/flashcart in the 3ds that doesn't boot right?
I still wonder why booting with a DS game in the slot caused my 3ds home menu to not load normally...yes the game could not be detected properly because it was a little dusty...but to cause a black screen...-_-
PS: It might sound stupid but have you tried blowing/putting compressed air in the slot and in the SD reader...
What about:
back up the content of your SD card, reformat it to fat 32 then put your content back or even better try with a new sd card
Replace your current Luma with Luma dev 6.2.3
Put 11.0 firmware.bin in Luma folder
Move the exdata folder out of your 3ds folder or even move all the Nintendo 3ds folder out of the sd card and only keep luma's arm9loaderhax.bin file in there
restore a last month/or older back up with hourglass9
Well...You don't wanna stay with a 200 euros brick do you?
...wait...maybe if you're in the US you could send it to vb_encryption_vb...he is a hardmodder maybe he can look inside and see if a component is broken and needs to be replaced...