If you get a purple screen on the Television screen while your Roku device connected with Screen. Here are some steps to solve this issue. Firstly, you unplugged all cables from your Roku Device. After that turn off the Roku and unplug its power cord and repeat the same thing with your TV. After that, you are required to reconnect the HDMI cable and check whether or not it is firm and secure. Then, turn on your device and screen, play some videos. If you get same error, after this. Call Us On:- +1-888-270-6412 or +44-800-041-8324.