LawnMaster Display Backlight / LCD Failure

Robot mower's display is blank or very dim, but the mower still appears to operate when scheduled.

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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

Failed LCD backlight, Loose display connector, Damaged LCD panel, Low supply voltage to display from main board

How to Fix / Troubleshooting

Safety first: Turn OFF the mower and disconnect the battery before accessing the display.

  • Check in shade: Move the mower to a shaded area to see if any faint characters are visible on the screen.
  • Inspect connector: Open the housing and reseat the display ribbon cable on both the display PCB and main control board.
  • Look for damage: Check the LCD for cracks or moisture inside the display window.
  • Measure voltage (advanced): Verify that the display is receiving the correct supply voltage from the main board.

If the display remains blank or dim, replace the LawnMaster display module. If a new display does not work, the main control board's display driver may be faulty.

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Repair Difficulty

Medium 3/5

Required Part

Display Module
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