How to Mirror the Monitor to an HDTV

by Scott Eilers

The high resolutions of high-definition televisions (HDTVs) makes it possible to use them as a duplicate display for a computer monitor in most situations. Mirroring a monitor to an HDTV enables the same image to appear on both a computer monitor and HDTV simultaneously. Mirroring can be done with any HDTV that has a video input port that is shared with one or more of the video output ports on the computer.

Connect the HDTV to the computer via a video port. Input/output ports commonly shared by both computers and HDTVs include HDMI, DVI, VGA, and S-Video. Once you have determined the type of connection shared by both devices, connect one end of a video cable of that type to an unused video output port on your computer and the other end to an unused video input port on your HDTV. Make note of which video input port the cable was connected to on your HDTV.

Navigate to the input the video cable was connected to in the previous step using your HDTV remote or front control panel. Press the "Input" or "Source" button until the appropriate input is selected. Depending on what operating system your computer is running, you may already see an image on the screen. If so, skip step 3 and move on to step 4.

Open the control panel from the Start menu of your computer and select "Printers and Other Hardware." Under the "See Also" tab, click "Add Hardware" and follow the on-screen instructions, which may vary depending on the version of Windows your computer is running.

Change your desktop resolution to one that is properly formatted for an HDTV. HDTVs do not support as many resolutions as most computer monitors, and the mirrored desktop image you see on the HDTV may not fill the screen initially. To fix this, right click anywhere on the desktop and choose "Personalize" or "Properties," depending on your Windows version. Choose "Display," and then "Adjust resolutions." The most common resolutions supported by HDTVs are 1280 X 720 and 1920 X 1080. If neither of these resolutions look right or are supported by your computer, consult your HDTV owners manual to determine which resolutions it supports and make adjustments accordingly.


  • close Some HDTVs are prone to screen burn-in if a static, or unchanging, image like a computer desktop is left on the screen for long periods of time. If you are using an HDTV to mirror a desktop image, especially a plasma TV, turn off the TV when it is not in use and take five to 10 minute breaks every hour to prevent burn-in.

Items you will need

About the Author

Scott Eilers began writing professionally in 2006. He has been published as a coauthor in "Measurement in Counseling and Development" and "The Journal of Counseling and Development." He holds a Master of Arts in clinical psychology from the University of Northern Iowa and is currently pursuing a Doctor of Science in clinical psychology from Argosy University.

Photo Credits

  • photo_camera black lcd silver image by Nicemonkey from