Chosen Solution
Everything worked fine before, but needed a new battery. Bought the new battery from Ifixit, replaced it, then booted it back up and now I get a white screen at startup. Tried to start in safe mode and still won’t get off of the white screen. Like I said it worked perfectly fine, before the battery swap. Any help would be great.
A white screen is usually an issue with the hard drive. Check your hard drive cable to logic board connection.
connect to external display if it still on white screen press command and r and press the power button the enter recovery mode
