"There's plenty of cases of electronics misbehaving due to exposure to strong light"...Around a million years ago, when the earth was young and laser printing hadn't been invented yet, I was an electronics tech working on phototypesetting machines. These machines (Mergenthaler VIPs) had a large zoom lens mechanism in them for producing different size print. One afternoon, a junior tech called me over because, he reports, "the zoom lens on one of the machines is going crazy". I get there and see that the zooms are running back and forth,. full speed, at random. I noticed the tech has a trouble lamp inside the machine. I turned it off and the lenses stopped their manic dance. He hadn't realized that the zoom lens travel was controlled by optical switches - the lamp turned them all on at once, producing the crazy bahavior.