The computer is turned off and the mouse and keyboard sound lights are still on. Why?

Hello, I love street dance. It's a matter of circuit design. The light is on because the motherboard is not turned on after being plugged in, but the power supply will output a standby voltage of 5V. Some motherboards support keyboard opening because of this, which does not affect the use. If you think it's a waste of electricity, you can unplug the host. 2. There are jumpers on the motherboard, so you can jump (don't connect them wrong to avoid burning the motherboard).