The control board connection is loose or detached. After checking the information on Beici's official website, we learned that the reason why the Beici switch did not respond when I pressed it was because the connection between the surface mount cable and the control board was loose or detached. Beici is a registered trademark of Wuhu Beici Electric Co., Ltd., a brand of Fanchen, and its positioning The domestic health industry focuses on the intelligent health care appliance industry.