A:AnswerYou cannot use headphones with the LG 720p LED TV – 24” Class (23.6” Diag), Model # 24LF454B because it doesn't have a headphone jack on it and it does not support Bluetooth so you can't use Wireless Bluetooth headphones either. ^CP
A:AnswerYes, I have it connected to a rabbit ears hd antenna and receive over-the-air tv signal just fine. I live inside the Dallas city limits.
Reception might vary depending on where you live.
A:AnswerThe LG TV only has an HDMI and a coax input. So your computer will need to have an HDMI output port, which is fairly common for computers manufactured in the past two or three years. Connect the two with an HDMI cable and set the computer display to 1280x720, which is the maximum display on the TV.