HP LaserJet Enterprise M607

Troubleshooting. Blank control panel

A blank control panel display can be caused by one or more of the following:

  • No power to the printer.
  • Power supply has tripped (over-current/over-voltage/temperature issue).
  • Check the cables and connections on the formatter and at the control panel.
  • Faulty components installed on the formatter (for example, memory DIMM or disk drive).
  • Faulty control panel.
  • M631dn only: Make sure that the embedded MultiMedia Card (eMMC) PCA is fully seated.
  • For touchscreen models, use the control panel checks section in the printer Troubleshooting Manual to troubleshoot the control panel
  1. Verify that power is available to the printer. If the printer is plugged into a surge protector or uninterruptible power supply (UPS), remove it, and then plug the printer directly into a known operating wall receptacle (make sure that the wall receptacle provides the correct voltage and current for the printer).
  2. Make sure that the power switch is in the on position.
  3. Make sure that startup noises are heard, which indicates that the power supply is operational.
  4. Make sure that the control-panel display wire harness is connected (at both ends).
  5. Make sure that the formatter connectors are fully seated. Make sure the power switch is in the on position, and then verify that the heartbeat LED is blinking.
  6. Remove any external solutions, and then try to turn the printer on again.
  7. If the control panel display is blank, but startup sounds are heard after the printer power is turned on, try printing an engine-test page to determine whether the problem is with the control-panel display, formatter, or other printer assemblies.
    a. Remove the formatter.
    b. Use a small pointed object to depress the test-page switch located on the rear of the printer.
    NOTE: The test page can only use Tray 2 as the paper source, so make sure that paper is loaded in Tray 2.
    c. If the engine test page prints, the print engine is operating normally (a failed engine test print page does not necessarily indicate that the print engine or DC controller is defective).
    d. Use the control-panel diagnostics to test the control panel. See the control panel checks section in the printer Troubleshooting Manual. If the error persists, proceed to step 8.
  8. If the print engine appears to be correctly operating (the engine test page successfully printed) and the control panel is still blank, replace the power supply.
  9. If after replacing the power supply normal startup noises and lights are still not present, replace the DC controller.
    NOTE: If the error persists after replacing these assemblies, escalate the problem to the Global Business Unit (GBU).
Error Code
Service Mode, Troubleshooting
Parts Catalog
New Register Forgot Password?
Send message to us