I just brought home a 27FS100 Sony with a Trinitron tube. It appears to have an off-color patch about 2" x 3" in the very upper lefthand corner of the display. The patch is only moderately apparent when watching most programming, but when a solid color background is up it tends to show as purplish (on a red background) or greenish (on a blue background). Very distracting and unacceptable in the long term. Is this a flaw in the tube, or something that I can adjust my way out of? I haven't had the chance to try a DVD yet to see if the same thing happens. Thanks in advance.