Technika LCD 24-621 Flat Panel Television User Manual


 
If the TV finds some, but not all, of the Digital channels, the TV
is functioning correctly but the signal being received is not
strong enough. (The signal strength needs to be above 85% -
you can see the signal strength the TV is receiving when you
search channels/ programmes) you will need to increase the
signal reception in order to receive all of the channels available.
The most economical way to do this is by purchasing and
connecting a 'signal booster' in between the TV and the TV
aerial socket. If this does not solve the problem, you will need to
upgrade the TV aerial to a digital hi-gain compatible aerial.
Digital TV Setup