Clean the filter if dust collects on the air filter or vent on the side of the projector.
When you replace the lamp, make sure you don’t touch the lamp with your bare hands. The invisible residue left by the oils on your hands may shorten the lamp life. Use a cloth or a glove to handle the lamp.
Press the A/V Mute button on the remote control or close the A/V Mute slide on the projector when you don’t need to display the image.