No one want's to address your issue here! Everyone just wants to gripe.
That of it not powering on. So I'll look at that problem. It's a poor tech that wants to replace the logic board first. First let's see if it will spontaneously boot. Disconnect the the mag-safe, disconnect the battery from the logic board. Press and hold the power on button for 5-10 seconds. Hook up the battery then the mag-safe. Tell me if it booted.