Hik Vision box will not view on TV unless I switch the CCTV box off and on again

I have had the CCTV box installed in December, all was working fine, then suddenly I cannot View the cameras on the TV, unless I reboot the Hik Vision box

I never switch the TV off at the mains, the TV is a Samsung SMART TV purchased 2015.

‘If I reboot the CCTV it will connect via HDMI 4 port no problem, I can then switch sources to Sky or TV and back again to view,the cameras and playback.

However, as soon as I switch off the TV by the red button on the remote and switch on...

Hik Vision box will not view on TV unless I switch the CCTV box off and on again