3DS No power after changing the game card slot.

Hey Yall,

Wondering if you can help out with my 3DS. I bought it with a bad Game card Slot. It powered on but didn't read games due to bent pins. I opened the 3DS up and changed the game card slot. I immediately tested the system by replacing the backshell and battery. The 3ds Powered on and recognized the game. I then powered down the unit to replace the remaining screws into the backshell. Now, i have no power on the unit, and no charge either. There is no LED lights at all. Its like the 3DS bricked. Mobo CTR-CPU-01. Any ideas?