Hacking can't boot old 3ds xl (11.3,luma 3ds)

[Orteis]

Hi guys,i have a problem with my old 3ds xl,a week ago while i was playing the top screen became black so, i decided to open the 3ds to see if a cable was unplugged but nothing after that it didnt boot anymore.Today i tried to turn on it again and i saw that i can access the A9HL menu but the top screen has a very low brightness and furthermore i cant do anything else,what can i do to resolve the problem?
Sorry for my english