@Rod Stewart posted:
Leandro, something else I thought of. Does Brazil use 240VAC power? And if so you are using a converter to step it down to 120 VAC, correct? If so, the converter must carry the connection from the legacy power supply ground pin (the round one) through to the ground wiring in your house, in order for the system to work properly. Check with your local electrician if needed to make sure this is done properly.
127v - 60Hz !