2DS XL wont charge, orange light holds 5 sec.

Hello Community,

I try to fix a 2DS XL of a friend and we have following problem:

when you try to charge the device, the orange light will turn on for 5 sec. then goes off and nothing happens. I assumed the Charging Port or the Battery itself would be the problem. I checked the Battery and tested it in my New 3DS XL, of course the Battery is smaller, but fixed with a folded piece of paper, it will charge and power up the 3DS XL. So i guess the Battery is fine. I charged the Battery for a while, but it wont boot the 2DS XL. So, do you think only the Charging Port is broken, or might there be a short circuit on the board, witch stops the 2DS from booting? Any helps or even suggestions what it could be would be nice.