TV unable to receive any ATSC channels
Modern sub-$250 television receivers make compromises in low cost hardware while supporting the best possible picture quality for internet streams. This can lead to compromises in fundamental performance for over-the-air (OTA) reception of digital ATSC TV signals. For example, the ability to monitor signal strength is often not present in such low-cost TVs. When a channel(s) that should be easily received is not available, the fundamental step of checking signal strength might be unavailable on a low-cost TV. A first step is generally to rerun the channel scan with the antenna (if indoor) positioned in a window facing the transmitter direction.
A diagnostic tool and possible solution is an ATSC tuner connected to the TV via HDMI. ATSC 1.0 HDMI tuners are available for under $30. The dedicated tuner may be of higher quality than the TV’s built-in tuner, and may provide a signal strength reading. Check product reviews to ensure the tuner is of good quality and has a signal strength meter. Some tuners can connect to an Android device or laptop via USB to receive broadcasts or monitor signal strength. This can allow a technically-minded user to diagnose reception issues including interference.