I do not understand what you mean with the screen lights up 1 led .. could you explain that a little more to me?
My iMac from 2009 broke down, boom, turned off. I couldn't get a peep out of it, no lights turned on, no buzz, no hard drive spinning, it was indeed the power supply unit, apple fixed it for 140 euro or something.
But if you have an LED light up, it is getting power .. so I am curious to hear what you mean with that specifically.
yesHow do you possibly see that? It's all in the inside of the iMac?
thank you very much, but we do not have here Apple already drove in 2 repair center, they do not know what the problem is probably bad centersBy what you have told me, and it won't make a sound, no lights, nothing .. it sounds like you can try two things. One, get another power chord that's suitable for your iMac and try that, if you get the same result, try two. And two being the option to just go to Apple and let them take a look.