Broadcasting 4K content from services such as Foxtel, Netflix, YouTube and hardware such as a Chromecast rely on a HDMI 2.0 connection, with HDCP 2.2 enabled.
HDCP is an anti-piracy measure that will generally only allow the output of content up to 1080p if it set to 1.4. In order to view 4K content with a HDMI connection, HDCP 2.2 must be enabled.
For our 4K TV range, this can generally be adjusted through the settings menu - for specific steps on enabling this, please refer to the relevant user manual.
For any further assistance, please contact our Support Team.