I've tried the SMC reset both ways (pulling the battery and holding the power button for 5 seconds, AND hitting the Control+Option+Left Shift+Power Button). I've reseated the RAM and tested one stick at a time. Still no response when the power button is hit. During the SMC reset the charging light turned green for a second then back to orange, so the buttons seem to be responding but no screen or fans turn on. HELP!