If you have tried all of these steps and you're still having trouble, it could be possible that either your cable or ports are defective – in this case, it may be worth trying a diffeent HDMI cable or replacing one or both of the ports. Lastly, double-check that you have set the correct input settings on your source device. If they are still not connecting, then try restarting the power supply of the projector and restarting your source device. First, check that the HDMI ports on both your device and projector are firmly connected with the cable. There could be a few reasons why your laptop is not connecting to a projector through an HDMI cable. Troubleshooting Issues with Connecting Laptop to Projector via HDMI

If you are still having trouble getting your laptop to display on the projector, consult your laptop's user manual for further troubleshooting steps. If the image does not apear immediately, press and hold down the Fn key and then tap the Display Toggle key to select the type of display. Once the cables are connected, turn on the projector and your laptop should recognize it. To get your laptop to display on a projector, you will need to connect the projector to your laptop using an HDMI or VGA cable.

Connect a projector to laptop with hdmi