my late friend gave me his pc before he passed and it was all in working order but for some reason the pc will not open up on my monitor i tried 5 hdmi cables and other monitors/ tvs around the house but still nothing what do i do?
Is the HDMI plugged into the dedicated GPU?
what are the parts? where are you plugging the cable into (motherboard or graphics card?) It could be as simple as you have a motherboard with an HDMI port but a CPU that does not have integrated graphics and you instead need a GPU.