So recently i had an issue with my charger and not getting any power to my MBP ( https://forums.macrumors.com/threads/1769544/ ). Figured it out, unplugged the battery, got some juice, good to go. shut it down, hooked up the battery, left it charging for a while. screwed the screws. booted 'er up. proceeded to do a SMC reset, and now im stuck. I get to the grey apple screen and get to 99%, just the smallest amount not filled and then the laptop will just shut down. any ideas?