4k no longer working

Was able to get 4k channels to display after changing settings on tv and direct tv stream box. When I first tried 4k a week ago I got a message my device was compatible but not able to display.   Got through that by changing settings on box and on tv. However, I had to reset my box just now because an update caused it to continuously loop rebooting itself.  Once I did, I now get the message my device is not 4k compatible even though settings on tv and box are the same as they were before.  Any ideas?