When I plug in a memory stick or a second joystick, my console freezes

Hello. My problem is that I can play myself, but when I connect a second gamepad to the console, both automatically turn off. It is the same with the memory card. I can play on one pad, but when I put it in the slot, the console turns off the controller. What can I do? I will add that tried to replace the ports with new ones, but it did not work. Thanks for help. And sorry for translate.