McDoD

I had the same problem 2 days ago. I'm not sure what tomcctv is referring to...but if the camera does not have a reset button on it...or inside the cover (on the board) there is no way to reset it as it is. Not even from the DVR since trough CVBS mode the DVR can't send commands to the camera. The only solution is to buy this item PFM820 | Dahua Technology (dahuasecurity.com). It is verry cheap... found it in my country for about $10. You need to pass the DVR coaxial cable trough this device and then you can set the mode back to CVI.