Not just a random episode, too - it’s one of the plot points in Who Shot Mr Burns

I can hear CRT screens. They emit a high pitch noise that nobody else in my family can hear, I assume most people actually can hear it but never noticed it. My family used to think I was crazy or had tinnitus (jury’s still out on both) until they tested me by making me close my eyes and tell them if the TV was on while turning it off and on at random, with sound off. It was a weird test from my perspective, since I could hear it fine anyway. So far I haven’t noticed a decay due to age, but if it had little use when CRTs were widespread, it’s now completely useless.