About a week ago, my projector lamp started making a 'rattling' type noise and nothing I've tried has caused it to subside. Has anyone else experienced the same problem with the DLA-RS66U? The projector used to be so quiet and now it's very distracting to hear this noise, especially during dialogue scenes or quieter moments. And, no, I don't have the projector mistakenly set to 3D for brighter (and louder) lamp mode. My projector is only a couple of months old. Thanks.