Hi, Today I received my new iMac and all excitement dissapated the moment I tried booting up my iMac for the very first time. There is a noise coming from the iMac (guess it's the fans) but the screen simply stays black. Nothing happens. No lights, no beeps - nothing. What could be the issue? I tried doing the PRAM thing but with no luck. Is this a dudd or am I simply doing something wrong. It's my very first iMac purchase so not happy at the moment. Thanks - help will be greatly appreciated!