Double check the connection at the back of the computer and also at the back of the tv to ensure the cable is plugged into the correct ports. (It is assumed that your video card is supporting a tv connection). Be sure the cable is plugged in securely at both ports.
Next, be sure you're using the correct input or source on the tv. To check this, press the "Input" or "Source" button on your Tv's remote until you reach either "Aux" or the apupropriate input/source that displays the image from the computer.
If those don't work, unplug the cable from the tv and computer and inspect it to be sure that no pins are bent or broken off. Missing or bent pins will result in loss of data between the computer and tv. This can cause the connection to not work.
Verify that your video can, indeed, support TV output. You may need to enter your video card setup or configuration. You can do this from within the Windows control panel, or the interface software that was installed with the videocard when you put it into the computer. Sometimes you have to change a setting within the video card control panel to enable TV output. Sometimes you don't. Videocard models vary, so there is no cut and dry procedure to follow. Simply open the control panel for "Display Properties" and hit the "Advanced" or "Hardware" button/tab. You should find a "Display Adapter" listing, with the name of your videocard. There may be a "Properties" button within this section as well. Click "Properties" to bring up a selection of additional options to choose, and possibly another option to enter the videocard's interface software (which may include even more choices that may help you out).
You have to hit the video button on the remote and go to hdmi
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