Make sure the cable is tightly fitted at both ends.
Hdmi cable not connecting to computer.
You can easily do it by using the cable to connect another pc with its monitor or tv.
You should check whether hdmi cable is correctly inserted on your pc and monitor tv.
Unplug the hdmi cable from your computer tv reboot your computer and reattach the cable.
If it gives the correct output then your cable is fine.
If it passes turn the p2717h off open the dell laptop lid.
Check the hdmi ports of your input and output devices.
If this happens often consider getting locks for your hdmi cables or self locking cables.
Click the icon that resembles a gear to open the settings menu.
Check hdmi cable connections.
Use the tv remote to select the hdmi port connected your pc as the video source.
Hdmi connections don t fit as tightly as a component or composite video connection and sometimes slip out.
Connect the hdmi cable from the hdmi port on your pc to a free hdmi port on your tv.
Purchase the right sized hdmi cable to connect your pc to your tv.
Check the hdmi cable to see if there are any physical damages.
If not you need to replace the hdmi cable.