Older Apple monitor connected to Mac mini won't turn on
I have an older Apple monitor connected to my Mac mini. Over the past several months it has occasionally suddenly gone dark. Generally I have been able to restore function by disconnecting and reconnecting a plug. Yesterday it went dark while I was away and I have been unable to get it to turn back on by dis- and reconnecting , restarting mini, unplugging and replugging, touching start button. I appreciate any suggestions.