HP LaserJet M426 Pro MFP

Use the secondary service menu to print service-related reports and to run special tests. Customers do not have access to this menu.

Open the secondary service menu (LCD control panel)

1. Make sure the product is in the Ready state.
2. At the product control panel, press the OK button to open the menus.
3. Press the left arrow button, and then quickly press the Cancel ✖ button.
4. The product returns to the Ready state. Press the OK button to reopen the menus.
5. Select the 2ndary Service menu, and then press the OK button.
6. Use the arrow buttons to navigate the 2ndary Service menu.

Open the secondary service menu (touchscreen control panel)

1. Make sure the product is in the Ready state.
2. From the Home screen on the product control panel, touch the Setup ⚙ button.
3. Touch the empty space (callout 1) between the Home ⌂ button and the Help ❔ button, and then quickly press the Back ⮌.
   
4. The product returns to the Ready state. Touch the Setup ⚙ button to reopen the menus.
5. Touch the 2ndary Service menu.
6. Use the scrollbar to navigate the 2ndary Service menu.

Secondary Service menu

Menu item	Sub-menu item	Description
Service Reports	Cont Self Test	Print a continuous configuration page.
	Error Report	Print an error report.
Location	A list of available locations appears	This item sets certain product parameters that are dependent on the location, such as the default paper size and the symbol set. Scroll to the appropriate location and select Yes to set the location. The printer automatically restarts after you change the location.
Line Frequency		This item allows the refresh rate of the touchscreen control panel to be changed between 50 and 60 Hz.
Display Test		Use this test to verify that the LEDs and characters on the control-panel display function correctly. At the beginning of the test, each of the LEDs is turned on one-at-time. Press the OK button to continue to the next LED. After the LED test is complete, the character test begins by testing the pixels on each line. Then, each of the 255 characters is displayed in groups of 16. Press the OK button to continue to the next group of 16 characters. You can cancel the test at any time by pressing the Cancel button.
Button Test		Use this test to verify that the control-panel buttons function correctly. The display prompts you to press each button.
Calibrate Touch Screen		Use this item to adjust the touchscreen control panel.
CP FW Version		This item shows the current date code of the firmware.
802.11n		(Wireless models only.) Enable or disable the wireless 802.11n functionality.
LED Test		This item allows the testing of the different LED Displays
NAND Reset		This item allows the NAND to be reset.
Speed		Use this item to toggle between high and low.