HP LaserJet Enterprise M552 - Keyboard test (M577 only)

Keyboard test (M577 only)
IMPORTANT: This test is not valid for the M552 and M553 models, even though this option is present in the
control-panel system diagnostic tests menu.
If the 6 Keyboard Test is opened on the M552 or M553 models, the printer power must be turned o to exit
the test.
HP does not recommend turning the printer power o during the control-panel system diagnostic tests.
1. Open the control-panel system diagnostic tests. See Open the control-panel system diagnostic tests
on page 118.
2. Use the down arrow button to scroll to 6 Keyboard Test, and then press the OK button to select it.
Figure 2-41 Open the sound test
3. When prompted, touch the H key on the keyboard or the Home button to exit the test.
ENWW Troubleshooting process 131