Hi Maurog1120, we will begin by making it clear that if the drive does not have the legend "rdy" or 00.0 Hz on the screen, it means that the equipment has no voltage, therefore it will not work, we will never do anything. Measure at the RST terminals, if they all have voltage, I mean if between R and S it has 380v. and if between S and T it also has 380v. If this is correct, measure in the small terminals that the equipment has, between 0 and +24, it must have 24vdc. If you do not have this voltage, it means that the equipment does not work because the power supply of the drive has broken down. In these cases, if we remove the housing, we can observe the presence of a fuse in the power supply, it is measured, if it is cut we replace it with another of equal value, we put the inverter on, press the RUN key and the motor must run. .