So, I used to have no issues with connecting my laptop to my hdtv, it would play on both screens and worked really well. I don't know what happened, but one day I connected it and the tv says "No Signal, Check connected device's power, cable connection, and source selection." since then I have tried so many solutions. i've changed my screen resolution, set my screen to "duplicate display" updated my computer, restarted both, and nothing. ever. please help!