Mitsubishi WS-55807 TV "grey border screen" Questions

...grey borders instead of black on a few channels. The picture color and brightness still looks great Any suggestions ..............? how old is your tv and whwer are those borders situated side top or ...

...border is this static I have a jvc interiart about 4 years old the screen has d purple colour on the edges . does this mean the tube is faulty or is it related to static or magnetisum from speakers ...