Picture freezes but only on bbc channels have tried retuning.
This could be too much signal thanks to the Freeview retunes going on. Your aerial is more sensitive at some frequencies, so there's more signal power higher up the frequency range. The signals for BBC and ITV are among the strongest ones broadcast. If they are now at a point on the aerial's range where they are too strong for the TV then the tuner will over-saturate. The result is the same as no signal.
A simple and inexpensive diagnosis tool is a variable attenuator. The MA1620 on this page is perfect for that job:
Splitters amplified splitters and attenuators
It will give you a way to reduce the signal level at one TV without affecting the other TVs in the house.
SOURCE: Loss of BBC channels
You may lose some channels when you retune the TV as the channels have been rearranged. To locate them look at the EPG although you may still find that some channels are no longer available on FREEVIEW. See the following link for additional information
http://www.freeview.co.uk/_retuneinfo/
If the above process does not work then check the link above for additional information and also visit the accompanying site links below to find more information for your model of TV / FREEVIEW box.
For troubleshooting the retune procedure visit http://tvretune.co.uk/troubleshooting/
For specific model information visit http://tvretune.co.uk/productmanuals/
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