> Random freezing at different points of the boot process suggests a hardware failure, not something broken in the software boot chain.

Power issues all day long. It'll be fine until the SoC enables enough peripherals for one of the rails to sag down.

That being said, it's a hell of a coincidence that it failed exactly when a software update failed.

▲

nottorp 2 days ago | parent [-]

Firmware update changed the order in which power is enabled to peripherals?

▲

ErroneousBosh 2 days ago | parent [-]

Maybe! I could certainly see something like the firmware switches on something way heavier that pulls down an already marginal supply.

Remember the very early Raspberry Pis that had the polyfuses that dropped a little too much voltage from the "5V" supply, so a combination of shitty phone charger, shitty charging cable, and everything just being a little too warm/cold/wrong kind of moonlight would just make them not boot at all?

	▲	nottorp a day ago \| parent [-]
		First Raspberries I worked with were 3s :) They were losing usb once in a while if ran 24/7. Had to make them self reboot every couple hours. Fortunately it didn't matter for what we were doing with them.