This is my 1984 IBM clicker keyboard that has been going strong for 35 years. But today it suddenly stopped lighting up! O sorrow! This is one of the real things, not one of the six-ounce plastic jobbies that come with desktops today. It weighs about six pounds and in its day, this clicker was worth $600. I’m hoping I can find some repair geek around here to take a look at it. I’m suspecting the problem is in the cable.