Clearable Warnings
A clearable warning indicates a transient condition in the printer. The printer continues on line while the message is displayed in place of 00 READY. A clearable warning appears each time the printer alters resolution or page protection (this causes reconfiguration of memory), or aborts a job due to an invalid or uninstalled personality, or insufficient memory. Clear the message by pressing [Shift] + [Continue] (or Go for the LaserJet 5).