HP LaserJet M577dn Enterprise Color MFP
Troubleshooting. Touchscreen diagnostic mode (M553x only)
Use the diagnostics in this section to test the control-panel hardware and embedded firmware. These tests are useful for checking control-panel functionality independent of the printer control-panel system diagnostics. To test the control panel using the system diagnostics.
- Locate the diagnostic-tests access button on the back of the control panel.
- Press the diagnostics-access button. Repeatedly pressing the button cycles through the available diagnostics.
NOTE: A pen, pencil, or other small blunt object is needed to press the button.
TIP: When pressed, the button illuminates green. - A yellow screen appears (after the first press of the button) indicating that the control-panel firmware is
version A (a magenta screen indicates version B firmware).
NOTE: If a different color appears on the screen, contact your global business unit (GBU) to determine
the firmware version.
TIP: After 4 seconds of inactivity, the diagnostic mode times out and is exited. - Touch the screen to cycle the screen through the following:
A red screen, a green screen, and a blue screen.
Five brightness levels of a white screen.
A final black screen.
TIP: When the final black screen displays, press the Home button to cycle through the diagnostic
screens and test its functionality. - Pressing the diagnostic-tests button with the black screen displayed, exits the diagnostic mode.