Mini M8S II saturated colors

Hi i received my Mini M8S II 4K Smart TV Box Amlogic S905X Quad Core Processor which I ordered . I connected it to my tv and downloaded the updates as it was suggested. After a while the screen is saturated with green colors as you can see from the attached picture. I tried to change the HDMI cable or the HDMI ports but the problem remains.As i am a newbie to the use of boxes I thought it might be a problem with Kodi configuration, but then I noticed that it happens after a while that it is powered on and even at the main menu. It keeps changing saturation. Do you have any idea why this is happening or should I return it?