i just bought a used macbook, for about 1 year now there has been a red pixel line on the lower left side of the screen and the pixel line runs about 4 inches up, i ran a pixel check and tried massaging the screen and nothing works, i ran a program called PiXel and found out that it turns red on red, yellow on when all the other colors on the screen are blue and And it turns reddish when all the other colors are blue, it turns orange-yellowish when all the colors on the screen are black and its white when all the colors are white. now my question is do i need a new lcd screen? or do you believe it's one of the connectors? or do you think its the logic board? I can replace the lcd screen but it costs 75 bucks on ebay, so i want to make sure before i make this investment Thanks!