i have an "older" cinema display (five years old or thereabouts, not sure) that i've used with my imac desktop computer for a year or so now and it's been great (i'm a writer and it allows me to have two different documents up at the same time -- invaluable). i came back from a trip and the display won't respsond at all. nothing. won't light up, won't turn on, dead. people have told me the adapters go out, so i want to test mine before i pay $100 or more for one on ebay. i can't afford a new display or i'd just do that.