how can i fix the channels?

Check what kind of signal you can expect.

http://www.wolfbane.com/cgi-bin/tvd.exe?

Make sure you have a good enough aerial AND a good quality aerial cable.

http://www.megalithia.com/elect/aerialsite/index.html

Re-scan the channels WHEN you are sure you have a decent aerial and aerial cable and you are getting a strong signal that is of good quality..

Allan
August 2010

The signal from your aerial is not strong/good enough.

Try realigning it and/or an amplifier.

T
August 2010