Bricked Old 3DS XL? Blue and White light come on for 3 seconds then turn off.. No screen No boot nothing..

[wps4]

Did you check the sd card with h2testw, and was formatted afterwards as Fat32 32kb clusters before adding the necessary homebrew files?

i already formatted it as fat32,and with h2 it says test finished without errors.

 

[Kwyjor]

i already formatted it as fat32,and with h2 it says test finished without errors.

How big is the card? What did you use to format it? And did you copy the necessary homebrew files, as suggested?

Are you using a microSD card in an adapter?

 

[wps4]

How big is the card? What did you use to format it? And did you copy the necessary homebrew files, as suggested?

Ar

my sd card is 4gb,i think i copy all the files,im using an adapter and a sd

 

[Kwyjor]

i think i copy all the files

I think you should make sure if you hope to solve this problem.

im using an adapter and a sd

Were you using the same adapter when you tested the card with h2testw? Sometimes adapters can go bad.