Chosen Solution
Hi, I have a new IFIXIT battery and a used logic board in my mid 2012, 15" MacBook Pro, 2.3 GHz, i7. My initial problem was the system was not turning on at all. Replacing the battery didn’t fix it so I put in a used logic board. Immediately the system powered on and I thought all was fine. Now it will randomly shut down to re-boot or when asleep won’t wake back up without first going through a sort of booting process. I am curious if there might be something I missed when installing the board. I didn’t use/think I needed any thermal paste, and didn’t have any parts left over afterwards so it’s all in there. I have reset the SMC, but have not yet tried re-installing the software or re-connecting the battery. Looking for more insight before I go chasing my tail! Thanks
Before you install a new copy of OS take note of your systems firmware release Apple Icon > About This Mac > System Report click on the left side Hardware tab to see the Hardware Overview copy off the Boot ROM Version & SMC Version info. The update your OS and compare what it is afterwards. Tell us what they were and what they are now if different and your OS releases.
I’m having a similar problem. How did you fix it? I’ve had 2 new batteries and a new logic board fitted and the problem still goes on. Apple keeps saying it’s working but when I take it home and it dies after 20 seconds.
try doing a P-RAM reset followed by an SMC Reset
