More and more we are seeing issues with read errors on overhead dvd players due to installation related problems. The most common error we see is that installers are over tightening the unit to the ceiling. When the unit is over tightened to the ceiling it causes the housing to distort preventing the laser mechanism and door pickup mechanism from operating correctly causing disc read errors and no disc errors. The way we recommend to install overhead dvd players is to have the unit lightly tightened to the headliner and use loctite to prevent the screws from backing out. This way the unit is actually suspended from the screws and is lightly touching the headliner.