Installation problem? in Installation Help and Accessories Posted March 18, 2016 Loose connectors? Insufficient amperage? Ground loop? Interference? If it's only happening at night, I imagine it likely has something to do with the IR or the extra power requirement. I don't know if I'd spend any time worrying about your cable, but bringing it indoors and testing it with a separate cable might be a place to start. That will at least tell you if it's environmental or a more direct problem with the hardware. Edit: I just saw you're using Cat6 cable. This is where I tell you that TVI, like CVI, is supposed to use solid copper RG59. That being said, someone is about to have a fit and tell me all about how Hikvision "says" you can use Cat6 cable. I've tried it. It didn't work consistently under any circumstances for me. That's all I'm saying.