Dear as they are! On this occasion I come with a problem that takes my sleep 2 months ago, I received a team from a client (who came groped from another technician) who made macaws and connected the compactera plate badly, therefore it was only flashing the blue light on the power button, after burning the tabs I managed to find the error between mail plate and mcu de compactera ... To all this, the client had taken him for the compactera locked and because he did not read the USB, I already synchronized and I set up the compactera, turn on and everything works, but the USB still does not recognize me any flash drive ... I already measured voltages and I get the necessary 5v to the port to turn on that port ... I need to know where to continue ... From already thank you very much!

Check all the MCU pins, the tracks ... see the diagrams I send you ... the MCU has the "USB DETECT" out there you can start https://adjuntos.yoreparo.com/imagen_post/0005/21/927b8685cfead88cf08cbfa568ec596b7bebb946.png" alt="" />