Check the following:
- Make sure the cables are correctly connected to your computer or video equipment.
- Make sure the power to your computer or video equipment is turned on.
- If you’ve connected a computer and one or more video sources, you may need to press the Source Search button on the projector or the Search button on the remote control to select the correct image source. Allow a few seconds for the projector to sync up after pressing the button.
- If you’ve connected a laptop computer, make sure it’s set to display on an external monitor.