Just in the last week we have moved into a new house in the Bayview, Auckland area.  I have a  Sony Bravia KDL40CX520 TV and a Magic TV 3600 for recording.  There a Sky dish (unused) and a VHF aerial which I have plugged into the Magic TV and then another cable going from the Loop Out plug on the back of the Magic TV to the Aerial In plug on the back of the TV.

Everything was working really well and I was watching QI on Prime last night when all of a sudden the picture went and a "No Signal" message came up on the TV.  Switching to TV1, TV2, TV3 showed that they all worked ok.  But Maori TV was also not working, which suggests that I'm having trouble receiving the Kordia Mux.

If I switch over to viewing the Magic TV then I can view Prime and Maori TV just fine.

I did a rescan of channels on the TV but that didn't help.

If I go into Manual Tuning on the TV then I can see that TV2, channel 29, has a Signal Quality of 100 and Signal Strength of 99.  TV3, channel 33, has a Signal Quality of 100 and Signal Strength of 97.  Prime, channel 45, has a Signal Quality of 0 and Signal Strength of 93.

On the Magic TV I see Prime, channel 45, has a Signal Quality of 100 and Signal Strength of 78.

Does this suggest that maybe the cable between the Magic TV and the TV is faulty?