If the DC 40 collar is displaying a solid red light, the firmware will need to be reinstalled with the Astro utilizing a "boot block" process.
To reinstall the firmware utilizing the Astro 320:
After software is finished loading, the DC collar will work as normal. It may take more than one attempt to get the software to reinstall.
*If collar has been removed from the Astro 320, it is possible to pair the two.
To pair a collar with a solid red light to the Astro 320:
It will now be possible to proceed with the firmware reinstallation for the collar.