Swann 8 Channel Security System

With the whole system installed and all cables tested I cannot keep all 8 cameras going more than a day without random Video Loss. It's never the same camera. Example, I had camera #2 and #5 drop out so I unplugged them and plugged them back in. After they rebooted everything looked great. The next day camera #3 dropped out, rebooted it and everything was good again. The next day #1 and #7 dropped out, it was like chasing your tail. If I unplug any two cameras the remaining 6 would stay on. I talked to Swann thinking the power supply was bad, they sent a new power supply but it did not fix the problem. I did test all the cables again and they all passed. After reading on line it looks like I am not the only one having this problem and nobody seems to have a fix.