Bionaire
Display Backlight / LCD Failure
Dehumidifier display is blank but unit still runs when plugged in
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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 display PCB, Loose display connector, Burned-out backlight LEDs, Faulty low-voltage supply to display
How to Fix / Troubleshooting
Safety: Unplug the unit before accessing the control panel.
Steps:
- Check basic operation: Confirm that the fan and compressor still operate when the unit is plugged in, indicating the main board is working.
- Inspect display connections: Remove the front panel and reseat the connector between the main PCB and the display board.
- Measure low-voltage supply (advanced): With care, verify that the display board is receiving the correct low-voltage power from the main PCB. If not, the main PCB may be at fault.
- Replace display board: If power is present but the display remains blank, replace the display/control PCB assembly.
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Repair Difficulty
Medium
3/5
Required Part
Display/Control PCB Assembly
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