This situation is usually caused by the work of the micro-control chip (block) of the driver board and the bus is abnormal.
First, test the power supply to ensure that the power output is stable and normal. Then check whether the peripheral power supply of the micro control chip is normal, especially the surrounding three-terminal voltage regulator chip and the related filter capacitor, and the fault location can be determined by recording and comparing the difference between the voltage of each operating point in normal and fault.
Then detect whether the microcontrol chip is overheated, virtual welding, whether there is thermal breakdown of the peripheral capacitor and so on.