How to Fix Touch Screen

Touch Screen use 4-wire resistance screen, four lines are: X1, X2, Y1, Y2. X1, X2 in the horizontal direction for a change in resistance,, Y1 Y2 for the longitudinal resistivity.How do you know which line is a two x1 x2 y1 y2? Touch panel along the four lines above are facing their own look at the screen from top to bottom in the line is about on both sides of the x1 x2 is y1 y2. Established