I updated to Monterey 12.3 beta 3 and it bricked my laptop. My own attempts at revive/recover via Apple Configurator 2 failed. They also failed at my local service center and after conversation with Apple they replaced the logic board.
I misread the release notes on Monterey 12.3 beta 4 and thought that the issue was fixed but... yep, bricked again and requires logic board replacement.
Apple developer for 36 years and have NEVER had software require a logic board replacement.
Be careful out there.
sfriedrich
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