The problem of night vision can be caused by an unstable power supply and it may be that your Infant Optics batteries/power source are faulty or not placed correctly. I fixed this issue by reading this guide https://www.10babythings.com/infant-optics-dxr-8-video-baby-monitor-review/. You can first do a battery reset by removing/unplugging the power source and putting the battery pack back after 5 to 10 minutes.