The power button turns the computer off, but not back on. Yosemite OS X 10.10 on mid 2010 MacBook Pro 15" Any help would be greatly appreciated. __________________________________________________________________ I have: (1) replaced/soldered a new keyboard connector on the logic board as it had a missing pin, (2) replaced the keyboard twice (the second and third keyboards work correctly), (3) tried jump starting the computer on with the jumpers but this did not work, (4) performed many PRAM resets, (5) repaired Disk and Permissions in Disk Utility, (6) ran Apple Hardware Test in short and extended mode without any issues identified, (7) attempted to do an SMC reset (although I don't see any sign of rather it happened or not) __________________________________________________________________ Does anyone know why the power button would turn the computer off, but won't turn the computer on? This is even though removing the mag safe, removing the battery, and then reconnecting the mag safe power supply does...