Nintendo 3ds possibile power issue
When I fully open my 3ds the power cuts off. I believe this has something to do with a loose connector.
Update (03/16/25)
*Makes a pop noise when the power cuts off.
Update (03/16/25)
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The problem is very possibly a loose cable connection from the upper half of the 3ds to the motherboard, since if the 3ds identifies that it is not connected to stuff on the upper half(cameras, 3d slider, screen), it would just forcefully shut down. Mine had the same problem a few weeks ago. In my case, it was a torn 3d slider cable, and it just won't turn on no matter what I do. However, when I swapped the old cable with a replacement, everything was back to normal. I don't think that your 3ds have anything torn, since it works just fine if the screen don't lay totally flat. In that case you'll just have to reattach the cables so that it doesn't disconnect. Here's the guide for it.
Nintendo 3DS Motherboard Replacement Guide
You only have to reattatch the cables since the motherboard itself have no obvious issues. However, be careful with the sockets of the cables, as they're very fragile. Good luck!
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also you can choose not to remove the screen on the lower half, the microphone and volume slider if you don't want to, but be careful as the cables of the lower screen could tear(I learnt the hard way).
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