Pins 14 and 19, but HEC was never really adopted and those pins are today used for ARC/eARC instead.

https://en.wikipedia.org/wiki/HDMI#HDMI_Ethernet_and_Audio_R...

And is implemented absolutely nowhere.

But why. HDMI is a video transmission format.

To reduce the number of cables, in theory, though as noted it's not really implemented.

But why would I ever need to connect Ethernet to a display that already has a video cable?

I think the idea was that you, for example, plug your console to the TV with HDMI and it would pass through Ethernet as well.

It's a multimedia interface.

Exactly. Thats what the MI in HDMI stands for.

"Or, buy 4K a monitor..."

It's 1/4 the area, minus all features, AND the same price!? 8-/

It's a great option, for dell shareholders...

We saw your comment the first time. No need to keep cutting and pasting the same reply to different threads.