Hi guys, I'm new on the forum and I'm after some advice please.I currently have a ELRO(Byron ?) Unit with 4 X Channel.The first problem that i have is in quad mode the dvr runs perfect but if i put it in auto after 5 mins.coloured lines flash across the tv and the camaras freeze, if i take out 1 camara no matter which one it works fine any advise please. 2. if i can't get over this problem i would like to change the dvr and keep the cameras,The cables from the cameras are (s-video with round 6 pin mini-din ends) they run through walls, floors etc etc so would be a pain to replace.My question, is there anyone who can recommend a way to replace the mini-din's with bnc connectors and power so that i have a choice of dvr's, I have tried Maplins and a few more places with no results, All help is greatly appreciated.