@Anonymous User Can you provide any more details?
These pages may be useful.
http://help.nowtv.com/article/Replace-faulty-NOW-TV-box
http://help.nowtv.com/article/Troubleshooting-NOW-TV-Box-and-Roku
I am not staff, I am a customer that likes to help,
so please click the Thank You/Thumbs Up button if I helped you out and maybe even accept it as a solution? 🙂