Error Code: 18 Upper MIO or Lower MIO

Printer Error - 18 Upper MIO or Lower MIO
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Error Message: 18 Upper MIO or Lower MIO

HP Error Code		18 Upper MIO or Lower MIO
Printers Affected		4Si
Description		The upper MIO card is initializing. During initialization the MIO is not active, but since the printer supports I/O switching, the printer remains on line and displays this status message. No action required. Display clears automatically (this can take up to a minute, depending upon the card.