If your unknown model of TV has an HD tuner built in you need to connect an antenna to the RF input, set it to over the air, and run a channel scan.
If the TV doesn't have a built in tuner you will need to get an external one with HDMI output.
If your unknown model of TV has an HD tuner built in you need to connect an antenna to the RF input, set it to over the air, and run a channel scan.
If the TV doesn't have a built in tuner you will need to get an external one with HDMI output.