Dahua 16 channel but 4 first channels in B/W

[pabloallietti 0]

hi i have a 16 channel dahua- all work fine but the first 4 channels show me in B/W 

i change the camera to number 6 and works fine with color . but if this camera plug in the 1-4 channel the dvr show this camera in BW ---- any advise?  

[Mark_M 3]

Is this an NVR or DVR?

NVR's use network IP cameras (Commonly will be POE powered).

DVR's use analogue coax 'BNC' connectors.

 

If it's an NVR, this will hopefully be only a setting to change.