HP LaserJet Enterprise M552 - Control-panel system diagnostics (M553 x and M577); Open the control-panel system diagnostic tests

Control-panel system diagnostics (M553x and M577)
Use the diagnostics in this section to test the control-panel hardware and display using the printer rmware
system diagnostics.
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Open the control-panel system diagnostic tests
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Screen test
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Touch test
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SoftKey test
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Backlight test
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Sound test
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Keyboard test (M577 only)
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Version
Open the control-panel system diagnostic tests
Open the control-panel system diagnostic tests from a touchscreen control panel
1. Turn the printer power o, and then on again.
2. Touch in the middle of the control-panel display when you see the 1/8 under the HP logo.
Figure 2-27 Open the Pre-boot menu
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118 Chapter 2 Solve problems ENWW