A:AnswerHi,
The power cord for model NS-24D310NA19 is permanently attached to the TV, so we don't sell replacement power cords.
Arely R. - Insignia Support
A:AnswerYes we hooked our Aunts to an internal wall mount antenna and she was able to get over 28 channels with great reception. I am sure an external would provide even more.
A:AnswerYes, this TV has a tuner in it that will scan for all local channels. If you have good signals in your area, the TV will find them in the scan process.
