Picture is juddering after new sky box delivered

[ANNA070181]

Hi. Have had issues with our sky box so Sky sent a replacement. Ever since we got it we have had issues. First the screen would be half green when you switched it on for the first time in the day. After messing with all the cables, switching on and off, it would be fine.......until the next day! Now the picture is juddering. Tried everything but won't stop. TV is fine with PS4 so has to be the box. Cant watch anything as drives your eyes mad. Anyone have any suggestions? Sky just keep telling us to reset it, an engineer came with the green screen but as it wasn't happening when he arrived he couldn't do anything! Help! Thanks. 

[Padam_Padam]

@ANNA070181 

If you've tried changing the HDMI cable and it's still not working properly I'd ring Sky and get the box replaced again. 

[ANNA070181]

Engineer coming next week! 🤦🏻‍♀️ Thanks.