Here are pictures of me starting my mid 2010 MacBook Pro from the logic board. http://db.tt/lXy8z3GJ. Please be careful. They are near the keyboard flex ribbon. If it doesn't work with the battery plugged in unplug battery connector and plug only Into AC power. My model has this problem because of water damage that seems to have affected the relationship between power button and battery. If at any point after starting up you can use your power button , perform an SMC reset. Hope this helps.