Error Code: 18 MIO Not Ready

Printer Error - 18 MIO Not Ready
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Error Message: 18 MIO Not Ready

HP Error Code		18 MIO Not Ready
Printers Affected		4Plus, 4Mplus
Description		The MIO card is not ready. The serial and Bi-Tronics parallel ports will continue to operate normally. SHIFT and Continue will not clear the display. To clear the display, switch the printer Off, remove the card, and switch the printer On. See MIO documentation for troubleshooting.