red_stars24 :
Hi! I really need help with how to connect the HDMI to the motherboard. I don't want to connect it to the GPU (because it doesn't work) and I can't find anything on how to do it. I just need an explanation on how to connect it. Please help!
You first need a motherboard with an HDMI connector. You second need a processor with an integrated graphics capability, although some (older) motherboards have graphics integrated in the motherboard chipset.
Assuming you're possessed of the above you'll also have to remove the discrete GPU so the BIOS won't see it and disable the integrated graphics. Then, just connect your monitor's HDMI connector to the HDMI connector on the motherboard.
What motherboard do you have? what processor?