If the control panel is blank when you turn on the product, check the following items.
1. Make sure that the product is connected directly into an active electrical outlet (not a power strip)
that delivers the correct voltage.
2. Make sure that the power switch is in the
on
position.
3. Make sure that the fan runs briefly, which indicates that the power supply is operational.
4. Make sure that the control-panel display wire harness is connected.
5. Make sure that the formatter is seated and operating correctly. Turn off the product and remove
the formatter. Reinstall the formatter, make sure the power switch is in the on position, and then
verify that the heartbeat LED is blinking.
6. Remove any external solutions, and then try to turn the product on again.
NOTE: If the control panel display is blank, but the main cooling fan runs briefly after the product
power is turned on, try printing an engine-test page to determine whether the problem is with the
control-panel display, formatter, or other product assemblies.
Control-panel checks
The product includes a diagnostic test mode for the control panel. This mode allows you to troubleshoot
issues with the touchscreen, the Speaker, and the Home button.
TIP: To diagnose control-panel problems, see Control-panel diagnostic flowcharts on page 130.
NOTE: Some of the diagnostic tests are for factory use only.
Open diagnostic mode
●
Tilt the control panel forward. On the back side of the control panel, use a paperclip to press the
button inside the small hole near the center of the control panel.
Repeatedly pressing the button will scroll through additional screens on the control-panel display.
Continue to press the button to scroll back to the diagnostic-mode main test screen.
Exit diagnostic mode
Do one of the following:
●
Touch the Cancel
button.
●
Wait 20 seconds and the control panel will return to the Home screen.
ENWW
Troubleshooting process
127
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