DaasYochid: See tosfos shabbos 95, “Ve-hurode chalos”, and the maskonoh of tosfos on boneh in yom tov. And, if you don’t hold like the Chazon Ish on that, then the other alternatives-mavir and mevashel- are even easier to me mattir on yom tov. As far as “Tikun maneh”- what are you fixing?? (At least boneh means that you complete a circuit but there is no “maneh”here -utensil to fix).
Nisht- thst is a big question. What new fire are you creating? the electric circuit and its many components already exist. I do know that this matter of “nolad” has been used to prohibit the forming of an electric circuit but it is very problematic to consider this “nolad”.
And what do you do for “ochel nefesh’if you have an electric stove?