The AGP PCI slot cannot be used because the north bridge is broken. The South bridge is broken. The hard disk of the mouse and keyboard USB interface is not recognized. First make sure your keyboard is broken or your port is broken! A new keyboard is not good that is the interface or motherboard problem judgment method is to change the keyboard (invalid) - check the interface circuit (interface no damage) -IO chip (good) - South bridge understand it I do service station! Pure typing is not easy to give a satisfactory answer ！！！！！！！！