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HP M426 M402 M403 M427 Printer Secondary Service Menu Access From The Touch Screen Control Panel

Updated: May 14, 2021

How To Access The HP M426 M402 M403 M427 Printer Secondary Service Menu.

While many HP Printers require a pin code to access the service menu, the M426 M402 M403 M427 requires a procedure. Use the following M426 procedure to access print service-related reports and to run special tests. End users do not have access to this menu.

HP M426 M402 M403 M427 Printer Secondary Service Menu Access From The Touch Screen Control Panel
HP M426 M402 M403 M427 Printer Secondary Service Menu Access From The Touch Screen Control Panel

Open the M402 M403 secondary service menu (LCD control panel)

  1. Make sure the M426 M402 M403 M427 printer is in the Ready state.

  2. At the printers control panel, press the 0K button to open the menus.

  3. Press the left arrow button, and then quickly press the Cancel X 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 2nd secondary Service menu.

Open the M402 M403 secondary service menu (LCD control panel)
Open the M402 M403 secondary service menu (LCD control panel)

Open the HP M426 M427 secondary service menu (touchscreen control panel)

  1. Make sure the M426 M402 M403 M427 printer 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 button and the Help ? button, and then quickly press the Back button.

  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.

Open the HP M426 M427 secondary service menu (touchscreen control panel)
Open the HP M426 M427 secondary service menu (touchscreen control panel)

M426 M402 M403 M427 Secondary service menu structure


M426 M402 M403 M427 Service Reports - Print a continuous configuration page. Print an error report.


M426 M402 M403 M427 Location - 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.


M426 M402 M403 M427 Line Frequency -This item allows the refresh rate of the touchscreen control panel to be changed between 50 and 60 Hz.


M426 M402 M403 M427 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 0K 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 = button to continue to the next group of 1 6 characters. You can

cancel the test at any time by pressing the Cancel X button.


M426 M402 M403 M427 Button Test- Use this test to verify that the control-panel buttons function correctly, The display prompts you to press each button.

M426 M402 M403 M427 Calibrate Touch Screen- Use this item to adjust the touchscreen control panel.

M426 M402 M403 M427 CP FW Version - This item shows the current date code of the firmware.

M426 M402 M403 M427 802.1 In - (Wireless models only.) Enable or disable the wireless 802.1 In functionality.

M426 M402 M403 M427 LED Test - This item allows the testing of the different LED Displays

M426 M402 M403 M427 NAND Reset - This item allows the NAND to be reset.

M426 M402 M403 M427 Speed - Use this item to toggle between high and low.


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