HDMI premium certified cable being used. HDMI enhanced setting is for HDMI 2 and 3. I am using HDMI 2 port. I appreciate the responses about making sure my settings are correct. But they are. Why doesn't anyone believe it's a DIRECTV problem? Their software is trash.
Well -I'm using a NON-Premium HDMI Cable that came supplied with my C61K - and I'm not having any issue with the tv not keeping 4k Checked.