hikvision 4 port NVR and hikvision cameras. I’ve got one Poe port that has stopped powering. Tried resetting the NVR and switching the cameras around but it’s still the same port that won’t power. It’s is only 4 ports so I’m blind in one and it’s a concern. I’d like to try something before I have to buy a new NVR. Absolutely no one diagnosing or repairing CCTV in my hood