The weather is playing havoc with signals at the moment so it's best to leave for a couple of days to see if it improves.
If things don't improve, you can try a retune from your settings or may be best to factory reset the box.
Try the aerial directly to your TV and retune this. If you lose channels there it may be an aerial issue in which case you will need to consult a local installer.
Let us know how you get on.
Please remember to mark Solved Posts with Best Answer. Doing so helps other customers and saves TalkTalk's Support Team time by only looking at unsolved topics. Thanks, Steve (a fellow customer).
