I had problems with my 2 year old Night Owl system. The cameras started blinking. I read reviews and many suggested that replacing the power cord might be an easy fix rather than replacing the entire DVR. It worked!
WOSODA Trail Camera: Waterproof 16MP 1080P Hunting Game Camera with Night Vision for Home Security & Wildlife Monitoring
11 Review
Wasserstein Solar Panel 13 1Ft Compatible Camera & Photo and Video Surveillance
11 Review
Versatile Adjustable Wall Mount with Enhanced Security for Both Indoor and Outdoor Use
11 Review
Blink XT/XT2 Camera Wall Mount Bracket - 360Β° Adjustable for Indoor/Outdoor Use - 3 Pack
11 Review