My 7500 seemed to spontaneously print magenta dark. I have troubleshot and printied magenta with no black in it- it still comes out very dark- like black is being added to it when it shouldnt. All other colors dont get black added. Before this, black was printing with light streaks, I replaced IU and cleaned lasers- but still there, only on black. I am at a loss what it could be. It was printing fine them all of a suddent added black to anything with magenta in it to make it very dark.
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