New Nintendo 3DS XL Bricked? Maybe OS deleted?


So about 7 years ago I was a little kid who was trying to homebrew a brand new New Nintendo 3DS XL and I may have messed up big time. I may have accidentally deleted the operating system of the nintendo 3ds. Not sure how but this is my best guess. The gist is that when i turn on the console the power light lights up but the system has both screens black screen and no amount of waiting makes it come on. I recently bought a new motherboard for the system but may have broken the mother board in an attempt to replace it. If someone could assist me in two thing i would be very grateful. The first being whether or not I should buy another motherboard for the console. The second would be if someone could point me to somebody who could install the new motherboard for me so i dont have to worry about breaking it again.