Hello everybody, I'm new here, this is my first post. Well, a couple of months back I bought a used 24" ACD from a seller on CL. I paired this display with another that I bought used, and later when I got around to upgrading my graphics card (so that I could use them side-by-side with my MacPro), I soon noticed that the second 24" ACD has a yellowish tint. After noticing this problem, I went through the calibration steps in the "Expert Mode" calibration found in Display Calibrator Assistant under the System Preferences/Displays/Color/Calibrate directory. This seems to only calibrate both screens to the same calibration, so even if I was able fix the yellow on second display, it would mess up the calibration on the first (but this is my first time messing with screen calibrations). I did some quick googling around and it seems this is a known problem with some of the apple displays, and from what I read the solution usually offered was to return/exchange the display while it is still under warranty. Since I bought the display used, and it is already some years old, I don't think that is an option for me. I can live with it, but would prefer to get it fixed. If there is a cheap solution for this problem please let me know. Thanks.