HP LASERJET PRO 200 COLOR M251n - Page 48

Control-panel diagnostics
The product includes diagnostic tests for the control panel.
Test the control-panel display
1. Touch the Setup
button.
2. Touch the left arrow button
, and then quickly touch the Cancel button.
3. Touch the Setup
button to return to the main menu.
4. Open the 2ndary Service menu.
5. Open the Display test menu.
Test the control-panel buttons
1. Touch the Setup
button.
2. Touch the left arrow button
, and then quickly touch the Cancel button.
3. Touch the Setup
button to return to the main menu.
4. Open the 2ndary Service menu.
5. Open the Button test menu.
Engine diagnostics
Engine test
1. With the product off, open the front and rear doors.
2. Turn the power on, and close both doors within 10 seconds.
3. An engine test page (a page containing multiple horizontal-colored lines) will print.
30 Chapter 2 Solve problems ENWW