Check Day/Night mode. Check setting or color.

Check whether “Motion Detection” mode is on.
Check the setting on multi-disk area.

Check “White Balance” Setting.

Check power connection.
Check video signal line connection.
Check whether the automatic lens switch is correctly set to “Direct Current” or “Video”.
Attach type of lens.

Check whether the lens is in clean condition. If the lens is dirty, clean the lens with lint-free cloth or brush.

Adjust light and shade of the monitor.

Check whether the screen is directly exposed to bright light.

When the camera is relocated, adjust the focus on the back of the camera.

Adjust the light and shadow control in the monitor.
When you are using intermediate equipment, check 75Ω/Hi-z and connection.
When using automatic iris lens, adjust the brightness if necessary.

Check whether the power complies with the standard requirements of the manufacturer or check on voltage fluctuation. Check ground loop.

Check whether camera is directly exposed to sunlight or fluorescent lamp.
Check whether automatic iris lens is used.
Check connection status of cables connecting the lens.