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I'm still lost and looking for some guidance. Anyone? I guess the tile of my post is wrong. I do have power just no lights. I noticed if i put a finger on the pins of the MCP4821 the constant tone goes away. When I release my finger it comes back. I seem to continuity between pin7 and GND of the power connector pin. I've also checked the 10K resistors as I saw you mention in another post about them affecting the lights.