Step1: Check the AC input terminal block, make sure UA(L), SA, N, both side connect well and correct, no wires loose out.
Step2: Check AC input connector on driver , make sure connect well with driver
Step3: Check SMD connectors on LED strip board, make sure firmed and wires connect well
Step4: Sensor version fitting , please make sure sensor 7,8 DIP switch are not on.
Step5: Driver failed, replace the driver.