Cables improperly connected to rear panel of the projector. Remote control batteries have run down. Check that the optional cable for the remote control is properly installed. Sound is heard but no picture appears. Color is faded or poor.
Picture is blurred.
Adjust the focus. The projection distance is too long or too short to allow for proper focus. Picture appears but no sound is heard. Cables improperly connected to rear panel of the projector. Volume is set to minimum.