This week I received two calls from HP Designjet 430 and 450c owners telling me that their trusty old machine was giving them a cartridge + data error and the initialization was very, very slow. Both told me that the error could be cancelled. This means that their sweet little plotters had line sensors that were bad. These are very easy to replace and cost less than $50. I've created a link below for you to buy line sensors for these plotters. When they come you just need to remove the two screws from the right side of the carriage, snap off the black plastic housing and pull out the old one and plug in the new one. Replace the black housing, it pretty much snaps into place. Replace the screws and your plotter will live for another 20 years -- except for belt replacements every 4-5 years. I've also included a link below to the new belts.
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