HP Color LaserJet Pro MFP M177fw

The product includes diagnostic tests for the LCD control panel.

Test the LCD control-panel display

Use this test to verify that all of the LEDs and characters on the LCD display function correctly.

1. Press the Setup button.
2. Press the left arrow button and the OK button at the same time. The 2ndary service menu is displayed.
3. Open the Display test menu.
   When this test is selected, the LEDs will first be turned on one at a time. Press OK to continue with the next LED. After each LED has been tested, the character display test will begin by testing the pixels on each line. The last portion of the test begins by displaying each of the 255 characters 16 characters at a time.
4. Press OK to see the next 16 characters, or press the Cancel button to discontinue the test.

Test the LCD control-panel buttons

Use this test to verify that all of the buttons on the LCD control panel function correctly.

1. Press the Setup button.
2. Press the left arrow button and the OK button at the same time. The 2ndary service menu is displayed.
3. Open the Button test menu.
4. Press the indicated button to continue to the next step in the test.