Here are some steps to troubleshoot the connection issue with the projector:

1. Check if the projector has power and is turned on.
2. Make sure the laptop is connected to the same network as the projector.
3. Check if the user has the right permissions to access the projector.
4. Verify if the cables connecting the laptop to the projector are working properly.
5. If possible, check if the same connection works with another laptop.
6. Install the projector’s drivers into the laptop.
7. Ensure the correct input selection is selected on the laptop.