Is the front camera red normal?

The video image turns red, which may happen on the camera or monitor, and it is not completely impossible to transmit the cable. The troubleshooting steps are: switch other images to the monitor that displays red images, and eliminate whether the monitor is aging ~ ~ Step 2, move the camera to the monitoring room and connect the monitor directly with jumpers. Replace the power supply at the same time to eliminate the camera problem or insufficient power supply voltage and current. Finally, the transmission cable problem remains the same ~ only by step-by-step investigation can we know where the problem lies.