How to display the display board when Haier intelligent water purifier HRO400-MINI7 is used?

Haier intelligent water purifier HRO400-MINI7 uses LED light to display the display panel. When a function is selected, the corresponding white LED light will light up.

Haier intelligent water purifier HRO400-MINI7 has always had five filter elements.

Primary filtration composite filter (PP cotton+carbon+scale inhibitor), secondary filtration composite filter (PP cotton+carbon+scale inhibitor), tertiary filtration reverse osmosis filter, tertiary filtration post-carbon ultrafiltration composite filter (post-activated carbon+ultrafiltration membrane) and tertiary filtration post-carbon ultrafiltration composite filter (post-activated carbon+ultrafiltration membrane).