Orange Light turns on 2 seconds and then off

Well i have a problem with this ds you plug the charger orange light turns on 2 seconds and that is it:

What i have tried so far:

- I already checked f1 and f2 and they are ok.

- i took the battery from another ds and it turns on with the black screen of dead. but it wont charge, i need your help and guidence can it be fixed or it is a dead end and the mainboard needs ti be replaced??