I have a Hikvision DS-2CD6D54FWD-IZHS running on the latest version of IVMS-4200. I've had the camera since 2019. Everything was working fine until a few days ago. The unit has 4 cameras in it and individually or all together randomly they will drop out and give the subject error. After a minute or so they will come back on. I've performed cold restarts, no change.
Any suggestions much appreciated
Any suggestions much appreciated