I'm having an odd issue with a 15" M3 Air I recently inherited from a friend. The machine powers on and runs fine, but when the lid is closed it shuts down. When you open it again it reboots. In addition, it will not go into any recovery mode, just playing the first quarter second of the boot chime when you press and hold the power button to do so. It also won't go into DFU mode, something which I've done before on other AS Macs. It exhibits the same behavior when plugged in or on battery power, also with the battery unplugged from the logic board. In addition, if you boot it up and plug in an external display, it works fine if you close the lid but reboots when you open the display.
Any ideas what might be up with this thing?
Any ideas what might be up with this thing?
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