PRINT HEAD DETECTIVE BOARD C7769-60007 FOR HP DesignJet 500 510 800 500PS 800PS A1 A0 42 24 C7769 C7779 PRINTER PLOTTER original designjet 800 800ps plotter gl 2 formatter pc board with hdd firmware c7779 60272 c7779 69272 c7769 60143 c7769 60300