New Roku Premier box is having issues with resolution. I am connecting with HDMI and the TV is an Element TV. I believe it's a 720P TV. The startup got by the language (English) but next step is the network connect where the screen flickers uncontrollably. The color resolution is also off so I can't get past the network select screen. I have tried different HDMI cords and ports. I have also tried different TV's but no luck. Has anyone had this issue?