I finally right clicked on my desktop screen of my Acer laptop as Tachybana suggested & after going thru the graphics card menus I found my solution easy as pie...my laptop doesn't support a TV screen. So....just b'c your laptops have HDMI portals doesn't mean they will work. I have an Acer Aspire 7745G, it has an HDMI port but sadly it does not support hooking up to my LG TV