-- See if the system is still at normal operating status, if not, please check whether the power supply is properly connected.

-- Press the button to determine whether there is resilience.

--Check if the color illumination on the button switches.

-- Check if the waterproof connector is tightly inserted.

--Check if the water pump socket is connected correctly.

--Check if the water level has immerged the pump.

--Please make sure the pump filter is properly cleaned.

--Double check if the water level is within the proper operating range.

--Check if the LED jacks are connected properly.

--Check if the control button is malfunctioning.

--If some particular LED diodes are not working, this indicates a partial breakage on specific diodes, not the whole panel.