Keyboard Not Working after moving in other location

My keyboard is working properly, there's nothing problem in my keyboard the last time I used it. Then lately when we clean our house, we move the computer desktop in other place. So we unplugged all the wires, usb port and cables that connected on the CPU. After we place it in other place, I plug all the wires, usb port cables and cables in CPU. Then I open the computer, the problem is, the keyboard is not working after we replaced the CPU. I don't know why it happen. I check the device manager and there's no (!) exclamation point under the keyboard. I unplugged and plug the keyboard port but still not working. What should I do guys? Any idea? please help me. Thanks.
