Hello, I have a 2012 MacBook Pro Retina Display 15 inch. I had replaced the battery and track pad, and took out the logic board to do so. When I go to turn it on, I type in my password. Then the loading bar loads to about 3/4 of the way. Then it shuts off. It turns back on saying something like “your computer restarted due to a problem.” I can’t start it in safe mode, or when I start it in recovery mode the Apple logo and bar just goes halfway and gets stuck.