My jvc x3 has two dark red lines spanning horizontally across the red panel. The photo doesn't emphasize it very well since the lines are dark red on red. It doesn't seem to be in the green and blue, mostly in the red. The pj is almost 3 years old with around 675 hours on it. Is this an optical block issue? Bulb issue? How much would it cost to get fixed if optical block? Thanks.