Chosen Solution
Unit is plugged in - green light showed battery is fully charged. no response to a power on function when the power button is pressed. Memory has been removed and swapped and no change in condition. Battery has been romoved and reconnected and no change in condition. Ran several restart keyboard actions and no change in condition. help!
I suspected that the C2D was the model in question. If you experienced in the past difficulties in starting up the machine, needing a few attempts to start especially in the cold, it’s almost sure it’s a logic board issue. There’s a capacitor that wears out and gets shorted. Heat temporarily disposes of the short. Either you move at the equator where the warmer climate might help starting your Mac or you’ll need a component level repair.
Try for a spontaneous reboot. Disconnect the battery from the logic board. Dis connect the mag-safe. Press and hold the power button for ten seconds. Reconnect first the battery, then the mag-safe. It should boot up on its own.
