The colors are weak, no matter what I adjust I can not get strong colors. If I make adjustments from the PC or the control panel on the machine no difference. Contrast and brightness work fine and so does the normal black and draft work fine. I also cleaned it according to the manual, and it wasn't dirty. I have replaced all toner cartridges with re manufactured ones, but I can't remember if this problem started before or after the replacement of the toner.