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.