Troubleshoot Mitsubishi VS-4506R

[losrx7]

I'm having a problem with my Mitsubishi VS-4506R. When I go to turn it on, it has the sound that its on, but theres no video at all. The sound is working fine, even when I change channels. The other thing i notice is, when I turn off the set, the 3 projectors turn on for a second, and that I can see all three colors.

I'm thinking its in some type of protection mode. What should I look at from here?? Thanks.