Unfortunately these boxes are approaching the end of their life and to cause various issues.
Do you use power line plugs to connect the box to the router?
If so are all lights on on both of these? Have you tried resetting them using the pinhole and then re-pairing them?
If it's directly wired to the router then try and alternative ethernet cable as this may have failed.
If nothing else works then you could try the following but please be aware, if there is a problem, it could cure the box, but it could also break it given the boxes are no longer supported and approaching end of life, usually due to hard drive failure.
Have you tried a soft reset? To do this hold the power button on the front for around 10 seconds and the box should restart.
If this doesn’t work then have you tried a YouView Maintenance Reset (https://community.talktalk.co.uk/t5/Articles/How-to-find-maintenance-mode/ta-p/1429347)?
Try the Factory Reset keep recording option.
You will then need to reset your personal settings (such as parental controls / Set antenna Out to On in Settings: Picture and Sound / Surround Sound etc.) and also reset your scheduled recordings (might be worth taking a note of future recordings before doing this so you don’t miss any).
If all else fails then try a full factory reset from the settings menu you've just used above. You will lose your recordings but you it's the final option available.
TalkTalk now only supply non-recordable boxes, So it's best to try all alternatives if recording is important to you.
You will need to phone and probably recontract to obtain a new box, but other options for recordable boxes are available from some retailers (see the pinned not regarding ITVX at the top of the TV forum page).
Hope it works and please 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).
