Disconnect bothe the battery and mag-safe. Press and hold the power button for ten seconds. Pul it back in and if the logic board is good, it should boot spontaneously.
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UPDATE
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'''UPDATE'''
ZAP the PRAM.
Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. You can release the keys after about 20 seconds, during which your Mac might appear to restart.
* On Mac computers that play a startup sound, you can release the keys after the second startup sound.
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* Next hook up an external monitor and see if you get anything.
Disconnect bothe the battery and mag-safe. Press and hold the power button for ten seconds. Pul it back in and if the logic board is good, it should boot spontaneously.
+
+
UPDATE
+
+
ZAP the PRAM.
+
+
Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. You can release the keys after about 20 seconds, during which your Mac might appear to restart.
+
+
* On Mac computers that play a startup sound, you can release the keys after the second startup sound.
Disconnect bothe the battery and mag-safe. Press and hold the power button for ten seconds. Pul it back in and if the logic board is good, it should boot spontaneously.