Hi,
I'm new to the cctv world, I bought a cctv system with dvr and 2 cameras, I wanted a 3rd camera so I bought a hd 720 camera but when I hook it up it doesn't work, it's just a blank screen, the cables all look the same, the dvr and cameras are called homeguard and this new camera is called lorax, the only difference I can see is that the new camera is HD And the other cameras are 480TVL, I've been looking up online but I'm a bit confused can I convert my DVR to accept HD cameras? Or do I have to buy 480TVL cameras only?
Thanks!
