Having the same error and nothing worked. But, in my case, the problem is that I am using an hdmi 3" enxtension (that was actually mailed to me by Roku representative) because the hdmi port faces the wall and I cant plug in the Roku stick, not enough clearance. Without the extension everything works fine. This extension is not DHCP compliant. I ordered 90 degree hdmi adapter, waiting on it. I will update later. I will suggest to upgrade the hdmi cables, to see if that works.