Micro maestro power supply

I configured micro maestro with software connected and powered through USB and ir works fine. Disconnected from computer and when I connect it with 12V power supply red LED lgihts indicating an error and it does not work. Can you help finding the problem


Can you post more information about your setup? For example, what servos and peripherals are you using and how many? What power supply are you using? Could you post pictures that show all of your connections? Also, could you post a copy of your Maestro settings file? You can save a copy of your Maestro settings file from the “File” drop-down menu of the Maestro Control Center while the controller is connected.