I have an HP DesignJet 650C plotter. It has the current drivers installed (no recent updates). Some items printed will have the colors confused, that is; a white background wil print as blue, and other colors will print differently than specified. These same items will print correctly on other printers, i.e., HP DesignJet 850. This occurs with schedules printed by Suretrak. Other items such as maps printed from DeLorme X-map will print with 98% of the colors correct, with maybe just a no-color area of a title block appears as a color.
I would appreciate any suggestions that will help me resolve this problem.