Last night I lost tv3, 4 etc.  I have signal strength but no quality.  I tried to rescan for programs and my Sony tv with built in terrestrial freeview deleted channel 3, 4 etc.  Manual tuning shows signal strength on channel 33 but no programs can be found.

I am in a fringe area but tv3 used to be good.  I can still get programs on channel 29, 35 and 37.

All help appreciated.

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What is the signal strength and how does it compare with the channels you still receive?

It may have dropped just below adequate level or perhaps you have some local interference just started up.

Signal strength is 93 on tv1 (watchable) and 78 on tv3 (just reappeared but breaks up).  I guess if it is local interference then there is not much I can do.

Thanks for your response.

OK. With those strengths you shouldn't be having any problems. Something is obviously affecting quality. Could be interference or faulty antenna system (bad joints etc). Firstly check the antenna system thoroughly. If no faults found I'd suggest turn off everything in the house except the TV and see if it improves. Quite often this sort of things happens with a Sky modulator in the system on the same or adjacent channel. If all else fails get a pro with the proper gear to check out everything. Without inspecting your setup it's probably impossible to diagnose.

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