Indoor or outdoor aerial. If it is outdoor is it in good condition?
Water ingress in the cable can cause loss of signal.
Does the aerial plug connect to the TV firmly.
Is the TV aerial plug in good condition, over time the solid copper core connection to the plug may
have loosened, it may be worth cutting the cable back and making a new connection.
When setting up the TV did you perform an auto tune, if so it may be worth trying a manual tune
to make sure the TV is tuned to the most suitable transmitter.
Click on this link, https://www.freeview.co.uk/corporate/detailed-transmitter-information
Enter your postcode and house number, press check.
The next page will show a table with your nearest transmitters with 'most likely' first.
Further down will be a tables of the transmitters and their broadcast information.
Go to the first one which will be the 'most likely' take a note of the numbers under the N in a black circle.
These numbers refer to the multiplexes (mux) the transmitter broadcasts.
Each mux carries several different TV channels and radio stations.
Take the aerial out of the TV.
Go to Settings and navigate to Auto Tune/ Search and with the cable out start the search.
This will remove all channels from the TV.
Reconnect the aerial cable.
Now go to Settings and navigate to Manual Tune/ Search.
Enter the first mux number and press Search, when done press Save.
Do this for all 6 mux numbers.
When entering the mux number note the Strength and Quality meters.
Ideally the Signal strength should be less than 100% too high and
this can cause interference and signal drop outs.
A variable attenuator reduces the signal strength reduce to about 90-95%
The Quality meter should be 100%.
If that don't work then it is time for a new aerial.
