1. Make sure that all cables are connected properly and firmly secured (Antenna, SCART TV) in the rear panel and then hand-tightened, if necessary.
2. Perform the first installation procedure. Tune the receiver to one of the available channels.
3. Make sure that it is possible to receive digital terrestrial signal in your area, and the antenna you are using is adequate for the terrestrial signal reception.
4. Try to change channel.