I dealt with Apple Care recently for about 2 months of daily phone calls, store visits, and chats. My MacBook had initially started restarting when it encounte

I dealt with Apple Care recently for about 2 months of daily phone calls, store visits, and chats. My MacBook had initially started restarting when it encountered any significant load. I got the logic board replaced and instead it started sometimes not waking from sleep correctly, producing "MCA data" kernel panics. In the end, it got narrowed to the fact that I had an external monitor attached whilst closing the lid of the MacBook. This issue had been introduced earlier than my initial repair, but had only started happening for me post-repair because the repairer had taken the liberty of updating my software and exposed me to the bug that Apple had introduced.