New Bravia won’t display 4K cctv without flickering

[Jim6791]

I was running my cctv in 4K to previous Bravia with no issue, I’ve just upgraded to a newer bigger model and the cctv image is now like a strobe light going on and off. Unwatchable. When I reduced cctv resolution to STANDARD it was better but still flickering every 10 seconds  Any help please?!

[Piscie]

Hi Jim, is your CCTV wired or wireless? If you're connecting it by HDMI try to change the port or the HDMI cable. And make sure to get the TV software updated.

Hope it helps!