Holly crap! My screen has been randomly flickering every now and then. Tried everything to fix it, including disabling color calibrations, unplugging things, and disabling screen dimming. I have an Ikea chair, and sometimes get significant electrostatic discharges when I get up or touch metal elements.

I have a mechanical keyboard with a small piezoelectric buzzer, and sometimes I've heard it click, although it's unplugged.

Everything makes sense now D: