This sucks for me... Anyways my ds can turn on and works normally but my ds won't turn off. you can still use it but it wont turn off. T_T the only way for me to turn it off is by removing the battery (so i can still use it but its annoying to always do it) and it'll turn on normally again. Edit : Never mind, it somehow turns off now
But unless you know what to do then opening a system is pointless. I'd pay for a repair, nintendo or a third party place.