Check the web app for a camera stream.

Go to Manage > Devices > Open the device > Configuration > Alert Zones

Toggle through each sensor to confirm you can see an image of what the camera sees.

Check cables for damage - visually inspect all sensor cabling, ethernet switch and power cables. Ensure cable insulation is in tact, and there are no kinks or bends at any point of the cable. Minimum bend radius is 50mm.

Check all connections - ensure all cameras circular connectors are firmly seated and tight in both the switch and power plug.

Check that there are fast flashing green lights for all sensors connected to the switch.

If you see one that is not fast flashing, double check it's power connection and try switching to a different port. If it doesn't fast flash in a new port replace camera.

Let the system boot up by waiting 3 minutes. If the light is still red, turn the ignition or vehicle key off and then on again.

If the light remains red after 30 seconds of doing this, contact Presien support.