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I found a YouTube link in your post. Here are links to the same video on alternative frontends that protect your privacy:
You don’t need an LED. You can just plug in a buzzer and listen to the boot codes the proper 1980s way. There are more complicated ways of debugging like connecting up a serial terminal and such but for all home computing purposes a buzzer is enough
Or the LED display that costs pennies could be in every board.
Uh… No. It’s a debug display, it’s for noobies to self troubleshoot
It just shows boot codes. The same can be achieved by a buzzer, an LED is just convenience
I’d rather get bankrupt than get an ear infection from an annoying buzzer.