Why does static discharge turn on my PC?

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It seems that no matter what gives me a static discharge in my room, it turns my PC on. For example, I often get a static discharge from my chair, and my PC turns on. Same thing if I touch my laptop, PC turns on. What causes it and how could I prevent it?

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Is it turning on from shut down, or waking up from sleep mode?

Your PC always has power as long as the power cable is connected. When it is powered off, the internal components just don’t route that power through anything that actually does something.

When you press the Power button, it closes an electrical circuit that tells the PC to start routing the power to all the other components, which then starts the boot-up process.

The internals of your PC are supposed to be electrically insulated from the environment, but if this is no longer the case it’s possible that the static discharge is somehow inducing a sufficient electrical charge in the Power-on circuit to make the PC think that the button has been pressed to close the circuit.

Things you can do to possibly prevent it includes making sure that the internals of the PC are clean (use compressed air to blow away dust) and free of debris, that the insulation on the wires connecting the motherboard to the buttons in the casing is not damaged, and that there is no damage in general to the internal components.

A humidifier might help. Static electrical build up and discharge occur more frequently in low humidity environments.

Be cautious is you decide to use one. Tap water contains a lot of minerals that get discharged into the air along with the water if not properly treated. This could lead to build up electrical components and surfaces which might cause other problems, however, not a huge concern. But a higher humidity should help cut down on the problem.

Most likely what is happening is the discharge is triggering components after the laptop power switch on the motherboard