We have a sharp lcd tv c/w built freeview,the last couple of weeks it keeps losing just 1 channel ie bbc1 or itv1 every other channel is fine if we retune the tv everything goes back to normal, is it the tv or the aerial

What you need to do is retune the TV, but when it is finished look at the regional settings. Or if the regional option is available before retuning, retune selecting your area so then you get normal BBC channels. It's likely that at the moment the channels for BBC are located at the very top end of the channel list say? - channel 800+.

You are clearly picking up signals from many transmitters. With regional settings you can change it to the area you live in.
But you will have to take into account how good your aerial is. Otherwise the signal quality will not be good on same transmitters. So the set may only suggest those with the best quality signals.
ITV stations might also change.
When done it will move the channels you mention to the top end of the guide, to 800+.

Note many HD channels have no regional options. For example here in Yorkshire we only get ITV Granada and not Yorkshire TV on the HD channel for ITV1. And BBC1HD does not show any programmes when local news comes on.

There are two things to check
1. Not all channels are available yet in all areas, and its changing all the time
http://www.digitaluk.co.uk/
the above site is full of information to help you
2. Is your tv aerial good enough, go to page 284 on teletext on BBC1 BBC2 ITV1 and Channel 4 and run a test that will tell you if your aerial is able to receive digital channels ok

If this helps please rate me

Buy a digital antena,or roof antena recieve better siginal,get everythings.Tries reset to factory setting retune again will get BBC1,BCC2 well get it back.

will not tune into english tv bbc1 bbc2 itv1

reset the TV to factory settings and try again

Start by doing a factory settings/ defaults on the Sharp rather than a normal automatic retune.This should then be ok. You need to empty the existing presets first so it will find the new type of signal BBC is now using.
If still not working for BBC1 +2 then look at whether you have too much aerial signal strength. (ie a booster/splitter that you could bypass)

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/

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/

Just got through to Samsung support. Turns out the freeview card had frozen and needed a reset. To do this put tv on standby. then press in serries these buttons on the remote: 'info' 'menu' 'mute' 'power' TV will then turn on with a default screen. Press 'arrow down' button untill you reach option 12 'reset' . then push the 'right arrow' and tv will reset and start in plug and play mode and commence a scan when you've set the time. Just retuned mine and its back to normal. Hoorah!!! :-)

Please see the following pages

http://www.freeview.co.uk/_retuneinfo/

http://www.freeview.co.uk/_retuneinfo/_format/downloads/ChannelGuide30September.pdf

The retune should sort this out