“Why is there a power port in the adapter if it is not needed?”

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• HDMI to VGA is not a passive conversion (meaning it requires power) -- it is a digital to analog conversion, so there is a processor inside the connector that does the conversion, and that processor requires power. Some HDMI ports provide enough power to the processor to do the work, some don't. If yours doesn't, you'll need to provide that power via a USB port and connect the two.

  Answered by Chris 8 years ago

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• The supplemental micro USB power port is for computers with limited HDMI output power. This adapter will not work on some computers (typically Macs) without supplemental power.

  Answered by Nickname 9 years ago

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• It is there if required for your particular application. Better to have it and not need it rather than need it and not have it.

  Answered by nonroadwarrior 9 years ago

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• From what I read, some laptops would have HDMI that can't power the adapter

  Answered by Colin 6 years ago

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