I am looking at a SureVision system that is starting to lose cameras on the multi window layout. The nvr is an SV-NVR2P16.V2 and both of the cameras that stopped displaying are SV-MB8-B.V2. The window shows "No Link" and no picture. If I single view either camera, they show a good clear picture. I've been through all of the settings and I don't see anything that seems off. Both cameras have been working fine for about 6 months and about a week ago 1 stopped and this morning the second one stopped. They are cameras 13 and 14 if that makes any difference.