How do you configure a laptop to play on to your TV?

Hello, Most computers can connect to an external display for mirrored and extended desktops. While high-definition television sets cannot match the resolution that many dedicated computer monitors are capable of, an HDTV can be a convenient way to view movies and websites on a larger screen. HDTVs typically accept a variety of inputs, and once you've found the correct input to match your output capabilities, connecting the two is as easy as plugging the correct cable in.

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Determine which video standard to use. VGA and HDMI are the two most common standards used to connect a computer and an HDTV, but not all computers support HDMI output, and some televisions will not accept VGA input at 1080p resolution. Check the technical specifications of your devices to make sure you're using the right cable.

Connect your video cable to the appropriate ports on your computer and HDTV.

Tune your HDTV to display either the VGA or HDMI input, depending on which standard you are using.

Change your display settings to match your desired setup. On a PC, you can accomplish this by right-clicking on your desktop and selecting "Properties." The right-most tab, "Settings," contains options for switching between the computer displays and, if your laptop's video card supports them, extended and mirrored desktop options...Hey, I enjoyed your question, I am a retired computer technician. I hope I have helped you...

source: CompTIA A+ Certified Computer Professional