Hi everyone, first time I'm posting on here. I've bought myself a new floureon 4ch dvr as I had to port forward my old one. This one just just scan the codes, anyway, everything is working apart from I can only get 3 cams working. other that keeps flashing on and off, pixel lines, losing colour. I've changed dvrs, cams, cables, power spliters but nothing fixes it. Any information would be very helpful.