Understanding screen signalling (without too much head strain!)
First off, we need to understand how the picture gets onto our screen in the first place, which is via signalling from the laptop's main logic board (or motherboard) in the base of the machine under the keyboard. Here the image you see on your screen is generated by the Video controller installed in your machine. The video controller, a bit like a USB hub, has several outputs for the image signal, these are called HDMI, VGA (the one's you probably already heard of) and then the internal display port which is called LVDS or EDP (EDP is a newer signalling language designed recently to try to make screens more compatible with each other. Not working very well is it!).
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