Towards the end of April, I was playing Pokemon Black 2 on my 3DS. I closed the lid one night and let it sleep. Over the course of the night the battery died. I woke up the next morning and tried to turn it on. It turned on for a little but then died again because it didn't have enough juice. I plugged in the charger to let it charge, but it never fully came on again. When I turn it on, both of the backlights come on, the power light comes on, the charging light comes on, and the wifi light will come on. The 3D slider light does not. If I hold the power button, but screens turn on and the 3D light and displays the regualr "In Sleep Mode, the system can..." message. From this screen I can power off fully, but when I try to go to the Home screen, it lags indefinitely.
With my 3DS in this state I've been looking for solution, I found out about the system update screen where you turn the system on holding L, R, A and up. This worked fine, both of my screens turned on and I could update, if there was an update to update. I've waited months for the update that came out a few days ago hoping that this would fix my problem. It did not. I contacted NIntendo about this problem and they didn't know what to do with it either, finally teling me to send it in for 100 bucks to fix it.
My 3DS is a launch day Black 3DS with ambassador games and everything. Every 3DS with this specific problem I've read up on so far have been 3DS from that window with ambassador games and all which leads me to believe that it might have been a defect with that specific batch of 3DS's. I made this thread to see if anyone else had the same 3DS as me that has this problem and if ANYONE has found a fix for it yet that doesn't involve me giving Nintendo 100 more dollars after the 250 bucks I paid for it at launch. Please help guys. Thank you in advance.