H500 and generic HDI monitor been working perfectly for several months. The HDMI monitor is turned off at night (on/Off switch) and On in the morning.

This has worked perfectly for months.

4 cameras displayed.

New behaviour: (lExact start time not known as we were away) - Turning on the HDMI briefly shows the 4 live cameras but then "Live stream paused" appears on all.

Resolution:  Leaving the HDMI monitor on - Turn the H500 Off - wait 30 seconds - Turn the H500 on. May require this twice. 

Occaisional Reboot will result in 4 black camera displays with "Live stream paused"

Actions carried out - SSD was full.  Re formatted - no difference.

In APP disabled Mirror function, re enabled with different Mirror, return to original mirror - works irregularly.