You may find that it is a simple issue of the lamp running over the max life, i.e. 2000 to 3000 hours, in which case you would need to replace the lamp. Sometimes you may be able to "fool" the projector by pressing both of the volume keys while powering up. Also, when you power down the projector and try to restart before the lamp goes through the full cool-down cycle, this same issue will occur. In the end you may need to send the projector for service as it may be a much greater issue.