I purchased the Q80T about 2 months ago, and from the first time we turned it on, there's a patch that's always darker than the rest of the screen just to the right of center. We though maybe it would work itself out, but it's still there. The pictures kind of capture it, but it's much more noticeable in person. I ran all the picture tests and calibration, but there's no change. I've seen in the forums that the only option is to replace the unit. Is there anything else I should try, or should I begin the replacement process?