Shade difference in lg lcd diaplay

I have a LG Flatron W1943S LCD Monitor bought just a week ago.No problems with connecting and getting the display.However on a closer look, the screen appears to be in 2 different shades. Screen appears to be halved by a vertical straight line, with the right half of the screen slightly brighter than the left half.Though this problem is not very annoying, I would like to get it rectified, lest it should materialize into a bigger display problem.Please advice.