2006 Intel iMac wouldn't power on
My 2006 iMac was dead since I had long trip back. I unplugged the machine before I left. Now nothing happened when the machine plugged and press the button (no sound just black screen). It worked fine before I left.
I tried to take apart the machine and all look fine inside. I replaced the logic board battery and still same. But I found once I put on the plug, it has "da da da" sound continually from behind the logic board. It means any part broken?
Thanks for help to save my old Mac.