Component Tests; Control-Panel Tests; Half Self-Test - HP LASERJET ENTERPRISE M725dn Troubleshooting Manual

Component tests

Control-panel tests

Open the following menus:
Administration
●
Troubleshooting
●
Diagnostic Tests
●
Available control-panel tests
LEDs: test the LEDs on the control panel.
●
Display: sequence through display tests.
●
Buttons: test the key pad and other buttons.
●
Touchscreen: test the control-panel touchscreen.
●
For more control-panel diagnostics, see control-panel checks in the tools for troubleshooting section of
the Troubleshooting Manual.

Half self-test

Perform a half self-test to determine which image-formation process might be malfunctioning.
NOTE: It might be easier to perform the print/stop test to stop the product during the printing process.
See Print/stop test on page
1.
Print a configuration page from the control panel.
2.
Open the cartridge door after the paper advances half-way through the product, which is about 3
to 5 seconds after the main motor begins to rotate. The leading edge of the paper should have
advanced past the toner cartridge.
3. Remove the toner cartridge.
4. Open the toner cartridge drum shield to view the drum surface.
If a dark and distinct toner image is present on the drum surface, assume that the cleaning,
conditioning, writing, and developing functions of the electrophotographic process are functioning
correctly. Troubleshoot the failure as a transfer or fusing problem. If no image is present on the
drum, perform the drum rotation test check.
184 Chapter 2 Solve problems
183.
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