I have been having problems with artifacts & flashing mostly on black & credit screens when I am streaming Hulu & Netflix. I tried switching out the HDMI cord to a much better one with gold plated connectors, 4k enabled with braided cord and it didn't help. I read another forum & it advised me to change the resolution settings, so I tried that too & that didn't help either. There was one other thing I tried too from a YouTube Video but I've only had this console for about 4 days. So any suggestions would be appreciated. I bought it used, so obviously there is no warranty. Thanks!