No power most of the time
My Imac won't switch on. I broke it down to view the diagnostic LEDs but can't find them - even after removing the screen. While i had it open, i cleared out all of the dust with a hairdryer and it started working. I put it all back together and its stopped working again.
Does the intermittant nature of this fault mean its not the motherboard or the power supply.
Is it the switch.
Help!