i moved and my mac mini hasnt been turned on in a week, i hooked it all up and it turn on fine and i was playing some tunes and i plugged in a ethernet cable and the sound stopped i couldnt get it back on every thing else seem to be working right so i tried to restart it and the monitor is just blank. i tried power on and off and held the start butten down and back on the mini seems to come on but nothing at all happens