How do I rescan my antenna TV? - Televison & Video

Impossible to answer without 'Make and Model', but we can guess.

Scan for what? Scan for new channels?

How to Scan (or Rescan) For Channels on Your TV

How-To Geek https://www.howtogeek.com > how-to-scan-or-rescan-...
Jun 19, 2019 - Find and select the "Channel Scan" option in your TV's menu. This option is sometimes labeled "Rescan," "Tune," or "Auto-tune."

Assuming that we talking about digital channel could be couple reasons. First- too small antenna or in wrong location. Usually at evening, night hours there is less interference from cars, running electrical equipment etc reception is better. Far away stations reception is also better at night. Trees, houses etc also affect reception. If you in USA you can use site: antennaweb.org to determine correct antenna and direction to receive channels in your location.

The TV might have lost its channel settings and would need them be rescanned and stored. Hope this helps

Guide to help get more channels on digital tv

spartacus-searching.com/dtv.html

Orginally there were many tv stations but the government decided to force ... Alsothese televison signals are more difficult to capture than before with analog signals. ...So that's not accurate when we are trying to find a TV transmitter. ... web page will tell you rescan for channels, thats great if you raise your antenna or have ...

How to sharpen digital TV reception via antenna

Plug antenna cable directly into antenna input on tv. Place antenna where you believe you will get a signal (don't know where you live but you can look up site map for optimum direction). Go into tv menu set tv to air and auto scan air channels. Your set will receive and memorize available channels. In your sets menu you should have a strength meter. You can use this to tune in the strongest possible signal. You may have to go back and rescan the channels because if you improve the antennas position you might pick up more channels and they won't just come in automatically. Once you've scanned and received maximum number of channels there will be no need to rescan again. If you do you run the risk of losing some channels and only a rescan under optimum conditions with regards to antenna position and environmental conditions will gain those back. Keep in mind some fringe channels may come and go. Hope this helps.

Ok This is what I found out and hopefully found your solution..
Have you heard of Double Rescan?
The Federal Communication Comission Designed a Process called double rescan.
Double Rescanning erases and thenreprograms the channels in the converter box an digital TVs memory.
To Double Rescan, you will first need to disconnect the antenna from the converter box or antenna.
Then disconnect the converter and or digital tv power supplies from the wall. Wait a minute before plugging them back in. The antenna should still be disconnected.
With the antenna disconnected run the channel scan function on the coverter box or digital tv. When the scan completes you will have completely removed any channel data the converter box or digital tv, had in its memory.
Now it's time to rescan for real.
Do this by reconnecting the antenna to the converter box or digital tv and running the channel scan function again.
Thus the double rescan is born.
If the double rescan doesn't work, then try some tips and tricks to get your converter box up and running..I will have to look up the url again that has the tips and tricks...
If the double rescan doesn't work let me know and I will look up more options..
I really hope this works..

Check and replace its main system memory IC.

Tries hook up to a roof antenna or a better antenna like a digital antenna.Than rescan ur tv again,for those DTV free air channels again.Ur tv now,should get all those DTV free air channels.

seems like you are using an "off the air antenna" that receives weak signal, you may be too far from the station, go get a roof top amplifier antenna or subscribe to digital service from cable, satellite or at&t uverse. If you think your antenna is getting good signal, try to rescan your tv for available channel. Make sure your TV set up is correct, if you are using Off the air signal, your setting should be set at "Antenna or off the air", then rescan your TV. Normally on Satellite or cable box, you just watch it on video channel or component input, if you are using HDMI then tune to HDMI channel.
Check your connection to make sure they are making good contact. If you can post your set up, I can better solve your problem.
For a resource on "off the air" antenna, go to www.antennaweb.org for help.

you probably need a digital converter box