I've checked HP's website for documentation and the only comment I can find says to switch the printer off and hold down the "Go" or "Online" button when powering up the printer, which I've tried.
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http://www.experts-exchange.com/Hardware/Peripherals/Printers_Scanners/HP/Q_23536291.html
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HP PrintersDate Answered: 07/09/2008 Grade: A Views: 10