How to repair the fault of left pontoon switch of Dingli flat car

Replace cpu board. Switch failure should be repaired or replaced with switch or cable or CPU board. Shanghai Dingli Construction Group takes Dingli Construction Group Co., Ltd. as the core, and owns a listed company, Shanghai Dingli Technology Development Co., Ltd. The core enterprise Dingli Construction Group Co., Ltd. was reorganized and established by the former Zhejiang Dingli Construction Group Co., Ltd. on September 1998 with the approval of the Securities Committee of Zhejiang Provincial People's Government.