If the printer is left idle for some time, it goes into sleep mode and switches off the front-panel display. To change the time that elapses before sleep mode, press , then Printer preferences > Sleep . You can set a time between 5 and 240 minutes. The printer wakes from sleep mode and switches on the front-panel display whenever there is some external interaction with it. The following table shows an overview of the two types of support menu available, for more details see Entering the support menus on page 96 . NOTE: The icons mentioned in this table will not be visible in the front panel:
you must press the front panel in the places where they normally appear, as shown in the front panel illustration at the start of this section. Start-up sequence There are three states between power-on and the Home screen: 1. Electronics initialization 2. Firmware initialization 3. Mechanical initialization State 1: Electronics initialization 1. The front panel moves from flashing white light to turning dark. 2. The printer reads the firmware. NOTE: At this stage, if something is broken, it will not be possible to enter the Support menu. To diagnose what is happening, go to the front panel blank troubleshooting. (and add here the link).
Subsequently, you can enter the Support menu to troubleshoot if necessary. State 2: Firmware initialization 1. The HP logo appears with a static bar. 2. Bundle board and ASICs are initialized. ENWW Start-up sequence 3 Label Description Support menu: This can be used by customers under the guidance of phone call agents assisting remotely. Using this menu, customers can perform troubleshooting tasks and access printer information. From the Home screen, press the following icons one after the other: , ,, . If there is a system error, you may not be able to reach the home screen. In this case, press the Power button and hold it down for 15 seconds. Extended Support menu:
Service engineers only From the Home screen, press the following icons one after the other: , , , .