I have a touch screen all in one desktop, running 8.1. I'm trying to connect my benq external display via dvi or hdmi cables.
I've plugged the power cable into the external screen and connected it via dvi to my PC. The PC picked up the fact there was another screen but the screen was saying no signal.
I then tried removing the dvi cable and putting hdmi instead, the PC did not pick up any change even after both had been restarted, however the screen said no cable connected.
I've made sure the screen has been on the right settings however no luck.
I then accidentally clicked only use other screen, now my PC is saying no signal, as is the screen, even when I've unplugged it, and now I'm pretty much locked out.