Chosen Solution
I’ve recently bought a 3DS. It can only work when the charger is plugged in. The charger can charge the battery (I’ve checked with a multimeter and a spare battery). When I unplug the charger the device shuts off. 3DS also automatically powers on when I plug the charger cable. I checked the power button but when the device is open it functions properly. I haven’t found any postings with similar issue. What can be the cause of this?
I guess there is something wrong the charging controller IC. Usually this would be the battery causing this. But likely the motherboard is failing if a spare battery is tried.. You could try both batteries on another 3DS. Or just to be completely sure, try it with another battery. Not sure which IC it is.. Maybe the “Texas Instruments PAIC3010B 0AA37DW” ? Perhaps someone else knows. Anyway, I think it’s motherboard related if other batteries won’t work either.
Hi Since it works OK when connected to the power but not when on the battery, I suggest that you replace the battery and check how it goes. Here’s a link that may help. Nintendo 3DS Battery Replacement
The motherboard may be in Kiosk or display mode. This only happens when the motherboard automatically turns on when it is plugged in without pressing the on button.
