HP Color LaserJet Pro MFP M177fw

The product has an engine-test page in the firmware that is printed by opening and closing the scanner assembly, top door, front door, and rear door in a specific pattern. Use A4 or letter-size paper to print the engine-test page.

1. Make sure that paper is correctly loaded in the tray.
2. Turn off the product.
3. Lift the scanner assembly, and then open the top cover, the front door, and the rear door.
4. Turn the product on. Within 10 seconds of turning the product on, close the front door, rear door, top cover, and scanner assembly to start the internal engine-test.
   
   If the engine test is successful, an engine-test page prints. The engine-test page has a test pattern of horizontal lines.