Check the hdmi cable to see if there are any physical damages.
Hdmi cable not connecting to computer.
You should check whether hdmi cable is correctly inserted on your pc and monitor tv.
Hdmi connections don t fit as tightly as a component or composite video connection and sometimes slip out.
If not you need to replace the hdmi cable.
If it gives the correct output then your cable is fine.
If this happens often consider getting locks for your hdmi cables or self locking cables.
Click the start menu on your pc.
You can easily do it by using the cable to connect another pc with its monitor or tv.
Make sure the cable is tightly fitted at both ends.
If you re not getting an image on screen at all try unplugging the hdmi and plugging it back in with the tv on and if that doesn t work leave it all plugged in but turn the tv off then on.
Unplug the hdmi cable from your computer tv reboot your computer and reattach the cable.
Click the icon that resembles a gear to open the settings menu.
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.
If it passes turn the p2717h off open the dell laptop lid.
Check the hdmi ports of your input and output devices.