I've encountered an Incorrect Yellow message upon turning on the printer HP2820
The printer would only display messages of functions commonly as ink shortages. For example, color printers with encountering ink shortge would display a message. However, continuing to print would produce least impressive cooration where for multicolored characters tend to appear in yellow. Also, printers with ink malfunctions require inspection of cartridges, ribbons, and compartments for mal alllignments. Readjusting the ink compartments would request performing test print sheets as reallignment check. At which situation, a continued malfunction would be detected as diagnosable by computer popup messages. Refer to the printer user guide. Good luck
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