See if you can run an Apple Hardware Test:
https://support.apple.com/en-us/HT201257
If successful, it may provide a clue.
Ciao.
Apple Event: May 7th at 7 am PT
See if you can run an Apple Hardware Test:
https://support.apple.com/en-us/HT201257
If successful, it may provide a clue.
Ciao.
2011 MBP crashes on login