@PUDD1958
If on the YouView box you go to Settings/Picture & Sound, you can choose what resolution it puts out. Mine ranges through 720p, 1080i, 1080p, UHD 50fps 8bit, UHD 50fps 10bit.
For Full HD, make sure it is set to 1080p, which it may be already
When you choose a setting, you get 15 seconds to accept it, if the picture looks OK, or to go back, if it doesn’t, or there isn’t a picture at all. Which would probably happen if you chose a UHD setting, which your TV can’t handle.
If you chose 720p or 1080i, your TV would upscale it to its native Full HD resolution, but the extra processing, and the TV’s need to ‘guess’ the extra pixels needed for Full HD, would result in an inferior picture, perhaps markedly, perhaps slightly, so stick to 1080p on the box for the optimum picture quality.
Some of the higher numbered channels might still look a bit fuzzy, as they are arriving in SD (Standard Definition), and so the YouView box has to upscale these to HD, guessing up to three pixels out of four, but this is unavoidable, and it is still best to let the YouView box do this for you.
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*** Longtime YouView box owner, BT Broadband customer, finally an EE TV subscriber ***
