My 2ds does this like once a month. It would be charging all night WITH the orange light when charging. In the morning the orange light wont be on. I try to turn it on but there is no blue light. I used to fix it by opening either godmode or luma3ds menus using their button combinations while...
When playing games both screens go black randomly turning on and off. I put it to sleep mode and back and it works for a second then goes back to flickering, then eventually stops for a while. The blue light is on the entire time during it. I have a feeling that it goes to sleep mode on its own.
@K3Nv2 I got some cheapies at wallys, that are pretty good, already have lost a few expensive ones (one falls out and gone, can't find) while cutting grass so bought some cheap ones, and of course never lose these cheap ones. (Cheap meaning only $35, compared to air buds which I only have 1 of 2 now)