My theory: Employee wears a large wool cover and sits on a synthetic materiel office chair(PVC?). As employee stands up, they pick up a fairly heavy static charge. As employee walks by, the motion of the static charge creates a moving magnetic field which then induces an electric charge in the monitor's electronics, causing the blackout.

Possible solution: replace wool wrap on employee 2 with aluminum foil.

Source on possible material combinations: https://www.school-for-champions.com/science/static_material...