HLS6767 Image Tearing Problem

Hey all, my father recently upgraded to a flat panel and so I picked up his old Samsung HLS6767W DLP. The image looks great except for one issue. I experience a lot of "image tearing" during left/right motion scenes. For instance if there is a scene panning by a picket fence, the slats will often be offset about half way up the picture. I vaguely remember I had a similar problem with an another old Sammy DLP and there was a service mode setting that I was able to adjust which had a huge benefit. I'm coming up dry in my searches though and I'm wondering if anybody out there knows the right adjustment for this issue. FWIW, it's connected via HDMI to an HTPC running at 1920x1080x60. I didn't have this issue with my previous set connected to the same HTPC at the same video settings.

Appreciate any help.

Thanks!

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