Problems with PWM servo driver PCA9685

Hi everyone, I have a problem with this servo driver, I've installed the library and I 've uploaded the sketch example but it doesn't work...
I made sure that all connections are correct but nothing...
I try to control a SG90 servo for the time being.
Thank you very much for your answers

Did you try the 'servo' example that came with the library?

How are you powering the servos? They may be drawing as much as 1000ma so you can't rely on the 5V coming out of the Arduino.