Hello just to let everyone no about Sanyo's so called warrenty. I purchased a Z4 in Aug 2006. Since then the projector has developed burn-in on both sides of the screen. I contacted Sanyo and they said they would be happy to fix the problem but that it would not be covered on warrenty. I have tried projecting a white screen for about 16 hr, no effect. Does any one know how to fix this? Can the blue panel be changed by myself.