I have a Philips 247ELPH external monitor and its colors are not very accurate. I've tried several times to calibrate it without calibration hardware equipment but it doesn't get very accurate. I use Apple's Display Calibrator Assistant and those times I didn't adjust the "Target White Point", the colors get pretty great but it bothers me that the color difference in the rows (dark row, light row, dark row, light row etc.) in iTunes aren't visible at all! Otherwise it's pretty great. To get the rows visible, I have to adjust the "Target White Point", but then everything else is slightly unaccurate. White becomes a bit yellow, and the colors are slightly too warm. I'll try again to calibrate it again today, but I have a few questions before I start: 1) Apple's Display Calibrator Assistant tells me to set the contrast to max but when I do that, the final result is pretty bad? Should I still calibrate it with max contrast or should I use the monitor's default settings? 2) Apple's Display Calibrator Assistant further tells me to have a screen brightness thus the circle in the measurement photo gets invisible. I try and try but it never gets fully invisible? 3) There are five steps of "Native Gamma". On the first few steps I don't manage to get the Apple icon fully invisible. Is this possible so early in the process? 4) I've heard we shouldn't adjust the "Target Gamma" nor the "Target White Point". Apple's Display Calibrator Assistant says that in most situations it's best to leave it on default. Is this true? I am thankful for any answer. Thanks in advance!