Are you scanning channels on the OTA converter box or the Broksonic TV? The setup should be antenna to converter box. Then output to the TV on RF, HDMI, composite or component video (depending on the box outputs and the TV inputs).

Even if the output of the converter is RF (coaxial antenna) to the TV, the signal may not pass through to the TV for all stations. The digital stations will be on Channel 3 or 4. Some converter boxes will pass through the analog signal; usually, this is not a default setting. If your set top box is connected to the TV by HDMI or composite/component video, then the TV will not show a channel scan option.

If you are scanning for stations using the converter box, check that your antenna is correctly oriented to see your local transmitters' signal. To check where your local stations are and the best type of antenna for the distance between your antenna and the local station transmitters, see Antennaweb.org or tvfool.com. Antennaweb assumes an outdoor antenna but is conservative in the station lists. If you use a splitter or an amplifier, remove those and check if the signal improves when going to a single tuner. I've had a splitter/amplifier that turned into a filter that blocked local stations. This happened after the unit was damaged. Replace faulty hardware. Similarly, a converter box can be damaged by a power surge caused by lightning.

Digital TV signals are an "all or nothing" data stream. If your tuner doesn't see enough of the signal, it will not tune in the channel. This signal will be attenuated by objects between the transmitter and your antenna. If there are tall trees or buildings in that signal path, you may need to place your antenna in a different spot or higher up on an outside mast.

I hope this helps.

Cindy Wells
(I will assume that the converter box has full power and is on.)

Without more details there is only a couple of conclusions - maybe the set top box you have is faulty or incompatible in some way with either the tv or the antenna.

Incompatibility with the tv seems unlikely as presumably the on-screen menus generated by the box are displayed satisfactorily - allowing you to select a menu, scroll and select an item and then view the channel seeking process. If this is so it suggests the connection between the box and tv is good.

That rather suggests the box is faulty or the antenna is faulty or incompatible.