So basically you went from an AHD DVR to a 960H DVR. Your HD cameras are not compatible with your new DVR. You need to buy "960H" cameras. There are some cameras that can be switched from 960H to AHD or vice versa, they're great for situations like this and also when you want to get a HD DVR again, you don't need to buy new cameras again, just switch the button between the modes. Here's an option: https://www.amazon.com/Outdoor-Security-Camera-1080P-Bullet/dp/B06VVZ42SY/ref=sr_1_5?ie=UTF8&qid=1507183511&sr=8-5&keywords=960h+hd+camera