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Message: <blockquote data-quote="Joematarazz" data-source="post: 1643626" data-attributes="member: 219134"><p>Well, it is not that I get no sign of life at all. There is a small heart beat. When I press the power button, LED 2 and LED 3 come on and quickly go off and then there is no sign of life. So power is reaching the board and something is telling me there might be a short somewhere? I read somewhere else that PSU in iMacs (as well as other Apple computers maybe) have a protection system in the 12V power line (when you press power button) that if a short is detected anywhere (video, board, etc.) the power is cut off. For the trickle power there may not be a protection, hence the LED 1 comes on on all iMacs with bad caps and power problem. I am starting to wonder if the caps are still to blame or maybe a bad soldering job. It was very difficult to remove the caps, to clean the occluded holes and solder the new ones in.</p></blockquote><p></p>