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[–] 19 points 1 year ago (8 children)

I don't know shit about cables but it's plugged into a monitor. My intuition is that a monitor shouldn't be pushing power out through a video input port.

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  • [–] 27 points 1 year ago (1 child)

    DisplayPort has a +3.3V 500mA pin specifically for pushing power. In theory, great for powering an active adapter. In practice, has killed motherboards because Dell can't design a computer for shit.

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  • [–] 4 points 1 year ago

    Friendly reminder that if you use a Dell charger on a HP, nothing happens but vice versa, you damage the motherboard. It kills a chip used for charging. Dell used the same size barrel jack, but they wired it differently from everyone.

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  • [–] -2 points 1 year ago (3 children)

    Signals aren't magic, they consist of electrical power. You can get at least a little bit of power from anything that isn't an optical port.

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  • [–] 2 points 1 year ago* (last edited 1 year ago)

    Technically, even an optical port can deliver power. Light is just a particular form of electromagnetic wave that just happens to use another method of transmission (and you might need a different mechanism to transform its energy), but it also has an intensity, potential energy and resistance in the medium of propagation.

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