poe fail

I got a call that a cam i installed 6 months ago was out. I was not expecting to find what I found, this type of failure is usually caused by moisture, rain but this cam was mounted inside in a automotive maintenance shop. I did not have a weatherproof boot on it. I have installed a ton of these...

I have 2 Hikvision cameras that went out on me this month. The POE stopped working but I can put them into a 12v power supply and they work fine. These were in locations though where a 3-6ft power cord is not long enough. I have tried using a POE extender / injector and none of those work...