Hi, just got a new x8 box and have noticed occasional white speckles on the screen. They look rather like the speckles you get with a poor HDMI cable due to packet loss, but they seem to appear around areas of the screen where there is detail or movement, which is odd. I've ruled out HDMI cable faults by using known-good HDMI cables. Also, certain video files play back with horizontal lines interfering with the picture. In both instances the issue seems to have been partially corrected by selecting the option to revert to the screen refresh rate that equals or aligns with the frame rate of the video playing, so video files now play fine. However the 'white speckles' still appear when I'm not playing videos and using the android system interface. Any ideas what could be causing this or any fixes? Have already updated firmware to most recent.