UPDATE: I raised this issue with UK Power Networks and they offered to examine the system. They concluded that the issues have not been caused by the spate of power outages we have had. Unsurprising!
Here are their conclusions:
This CCTV recorder and camera came in for inspection together.
I dismantled the recorder and checked the power supply for dama ge consistent with mains fluctuations
but no such damage was seen. The input fuse, VDR, rectifiers and smoothing arrangements show no
indication of stress caused by an excessive supply voltage. The power supply output was measured and
found to be within specification. The main panel lights are illuminated, as is the front display. We could
not find any damage consistent with mains fluctuations on this item.
Attention was then turned to the camera and interconnections. The IP camera was connected and we
obtained output via the HDMI port on the recorder using port 3 which appears to be the default port for
the main image. The unit will shut off if this is not connected.
It is notable that the camera is connected via CAT 5 and there fore does not run from a mains supply.
In conclusion, it may well be that there is some sort of problem with this system which we have not se en.
However, due to the lack of damage in the recorder power supply, we would not be able to conclusively
attribute such a failure to mains fluctuations, indeed the entire system is currently running on test with no
visible problems.
The camera itself runs via CAT 5 cable so clearly is not connected to the incoming mains supply. The
recorder which does run from the incoming mains supply shows no damage consistent with mains
fluctuations.
As always, interested in your thoughts.
