Projector turns on initially but then cycles off

Projectors may shut off for a couple different reasons.

1. If the projector over heats, check to see if there is enough ventilation for air to be circulated around the unit. Make sure fans are running and that there is no obstruction. Let it cool, clear obstructions and check fans when turning the unit back on.
2. After market lamps may cause an issue. This is a very common cause of a projector shutting off after a short time of being turned on. Aftermarket lamps have the same core but do not use the same housing materials. These materials may not dissipate heat as efficiently as the factory housing and cause the lamp to overheat, when this happens the projector will shut off. It is recommended that an original ViewSonic lamp be purchased.