If you have used it with the OTA antenna in recent years then you must also have had one of the digital converter boxes. Without that you would not receive anything unless there happens to be an analog channel still broadcasting in your area. This will also prevent a cable connection from coming through if wired that way and not using an A/B switch or the convertor having an analog pass through.
You are going to need to trace down what you have and where it goes. Since both OTA and Cable are not working I suspect that it is not an antenna problem but rather coax that is not properly connected.