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raoulangelThe Pi is supposed to be portable for a reason.. I am using it for my project because of it’s ability to provide the flexibility without the space requirements. The Power is supplied by 4 “D” batteries in the orioginal battery compartment under the unit. Cannot remove that. The extenal power plugs into a barrel connector at the side of the unit, the wires are attached internally to the power ports of the Pi and the screen. The speakers are powered from the Pi USB ports, and so will the LED lights for the Marquee. The interference was there even when everything was outside the enclosure laid out on the table.