Chosen Solution
So, I just got done fixing my 3DS however it appears that It won’t power on, it doesn’t make any noise, or do anything, the power button goes on for a bit, and then just turns off, the only thing not connected are the speakers (broken ribbon cable connector)
From my personal experience this happens from the camera flex not be connected 100% but it really could be from really any connector or flex being damaged, I mean did you try to flip up any of those connectors while you were in there? I’ve done it once and I obviously ended up in the same position as you from it. I’d just go back in and unplug and replug your connections and make sure they’re latched on by pressing on them a bit once you’re sure they’re in correctly. On the bright side you were just working on the bottom half and it’ll make easier to double check everything. Please let us know what happens!
If it is from gamestop, it may not be charged.
Try reseating your ribbon connectors. Chances are you didn’t fully insert one or two of them, causing the system to fail POST, which has the result of immediate shutdown.
I had this same issue and all I did was loosen all the board screws and it started working.
I have this same issue too. My speaker ribbon cable broke, could this be the reason to my 3ds not turning on?
Yes, if the ribbon cable is not functioning the system will not post and there fore will not turn on
