LG42LB670V TV Fails to Detect Terrestrial Channels: Antenna Power Supply & Troubleshooting

Hello, I have a problem tuning the LG TV, tv does not detect any channel from terrestrial TV, connect another receiver and everything works, so the cable with the power supply is working.
The antenna is with a power supply.

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Hello.
It looks like a damaged TV head. Not only that, the TV can even properly receive an analog signal and the digital one is not also anymore, please do not suggest it either.

and in no way does it go over this? that is, if I still have a warranty, it is worth reporting this fault, how can I be sure that the TV is actually a defect? so far I had a TV connected to the NC decoder + now I took it to work under the antenna with the amplifier.

In the settings option, you have probably selected a cable TV. Restore factory settings and reconfigure tv for reception by marking the source signal ANTENNA (terrestrial TV) and digital programs.
http://www.lg.com/pl/wsparcie/poradniki-wideo/CT20198005-1439875159454-others
If you know from which transmitter you receive terrestrial signal, it is better to program the receiver manually.
In Siedlce, these should be 9,36,43,52 channels.

I have already restored the system to factory settings. next the same "found 0 channels" I combined as much as possible in addition to manual programming.
I go in manual tuning,
options:
Memory> System> Bandwidth> Program> Name

I am looking in the "V / UHF AND CABLE" band and also does not detect any channel.
I am looking for the System in every option and also does not detect it

How to program differently manually with these channels what you wrote 9,36,43 ....

The condition is to mark terrestrial TV as the source of the signal. When a cable or satellite is selected you will not find anything.

siara-siedlce wrote:

How to program differently manually with these channels what you wrote 9,36,43 ....

LG wrote:

Home -> Settings -> Quick settings -> Channels -> Channel tuning -> Manual tuning
Allows you to manually adjust programs and save results.
In the case of a digital signal, you can check the strength and quality of the signal.

If another receiver works without any problems on this installation, you have a bad configuration or a damaged TV.

Okay, after talking to the consultant and the various combinations and shadowing, I have to connect the TV to the Other Antenna, if the TV does not detect also on that channel, I have a damaged tuner. so we see each other in the evening with the answer to my query, thank you all for the hints. Greetings.