Install the latest operating system and firmware updates: Whether you own a Mac or a Windows laptop, downloading the latest updates can often fix a lot of tech issues. Check the HDMI cable for damage: It’s possible that your HDMI cable may have been damaged while being stored or moved.Make sure all the edges of the port are sealed and that the cable isn’t being pulled out. Check the HDMI port on your laptop: Some laptops, such as some Surface Pro models, have curved edges which can make the HDMI adaptors disconnect.Firmly and carefully check to make sure that the cable is plugged in as far as it will go. Check the HDMI port on your TV: HDMI ports on TVs can often be very tight and it’s easy to think that the cable has been plugged in when in fact the connection is barely being made.Restart your laptop: Sometimes restarting your laptop with the HDMI cable connected can force its display to switch to the TV screen.
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