I have a b5442-ze that was previously working great. Without changing any settings, the night image has turned nearly black. The only image I have currently is from a neighbor's lights across the street. The image looks fine during the day. I can see the IR LED on the front of the camera at night and I can also see the IR light on another camera that has an overlapping field of vision (second photo). I have done a full factory reset but still very dark at night time. Shutter speed does not matter if set to auto or slowest speed. Can make image black with faster speed (as expected). I suspect this is some type of hardware issue. I am puzzled as to why the daytime image would look fine (i.e no stuck IR filter) but night is like the IR LED are not on yet I can clearly see they are.