I've just completed an 11 digital camera installation with NVR. This replaced an old analog system. All have been working great but last night it appears that one camera is having an IR issue. Early this morning, I went out and took a look at the camera. All the LED's were working but when viewing the output, it's very obvious that there is no LED (IR), pick up. A couple of days ago, night vision was perfect. So my question to you is, are your LED's visible at night? If so then we may have a similar problem. My entire system is under warranty but it is a pain to work through replacement.
Thanks,
Kirk