My computer electronics won't turn on when I power them on

When I connect my PC to the electronics line, the LED bulb on the motherboard lights up, but no fan turns on, the display does not come on, the mouse does not work, the keyboard does not work. When I connect my PC to the electronics line, the LED bulb on the motherboard lights up, but no fan turns on, the display does not come on, the mouse does not work, the keyboard does not work.