I assume you mean your TalkTalk box, not the TV.
Check the HDMI cable is in at both ends, best to take it out and reinsert. If it's still the same and you have a spare try swapping it out.
I don't know what box you have but again I've assumed it's an old YouView box, which unfortunately are approaching end of life.
If it is, Hi,
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 may be asked to do this before the Support Staff look at other alternatives.
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.
If it's a new 4k or TV hub, then a factory reset is required. The 4k can be done by pressing the side button 5 times.
If the box still does not work, and assuming you have a Freeview TV, then plug your aerial directly into the TV so at least you can watch programmes via the 5v tuner.
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).
