Hello, I just bought a new monitor about 6 months ago. It's a samsung syncmaster 955df. Withint just the last few days it has started to shake horizontally. Just like one pixel left then one pixel right at least a dozen times a second. I checked samsung about their warranty policy, but you need your warranty card, which dumb me can't find for the life of me. Do you guys have any ideas on what could be causing this, or do you think I could bring it to a repair shop and they could fix it? Thanks