HDMI error/H1005 -hdcp link integrity check failed
I am having problems with my TV signal only when I turn it on for the first time. Blinks on and off, eventually gives me the blue screen with HDMI error/H1005. I have talked to tech support many times and have a new box with same issue. If I unplug the box and reboot it I finally get a picture. Everything is hooked up through my Yamaha receiver. I have changed HDMI cables out of TV and out of box to receiver. ATT support thinks their equipment is fine. Seems to me if unplugging it makes it reboot and work fine it is their problem. Any suggestions??