La Marzocco
User Interface / Display Failure
Display or control panel is blank or partially unreadable, but machine otherwise heats and pumps.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Loose ribbon cable to display, failed LCD/OLED module, backlight failure, low-voltage power supply issue to UI board
How to Fix / Troubleshooting
Safety first: Turn OFF and unplug the machine before accessing the control panel.
Steps:
- Check contrast/brightness (if available): Some models allow adjustment; ensure it is not set too low.
- Inspect ribbon cable: Remove the front panel and reseat the ribbon cable between the main board and display/UI board.
- Check for moisture: Look for signs of water ingress behind the panel. Dry thoroughly and correct any leak sources.
- Measure low-voltage supply: Verify that the UI board is receiving the correct DC voltage from the main board.
- Replace display/UI board: If the module remains blank or garbled, replace it with the correct La Marzocco display or keypad board.
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Repair Difficulty
Medium
3/5
Required Part
Display / Keypad Board
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