Recently took 20" flat screen dvd toshiba tv in for dvd service. Just got it back plugged it into our cable and had purple/red shading on left side, even on dvd's. Took it back to repair sears service. They have no cable feed (they send it out for repairs). They put in a dvd and picture was perfect. Thinking it must have needed warming up or maybe the ride readjusted. Took it back home, same problem. Plugged another tv in the same exact location, no problem. Took problem tv to other tv location, problem still there. Have I finally lost my senses or what? Does this make any sense to Anyone? Anyone? If I take it back again, how can they find the problem?