5-2-6 #905 Error when connecting to the mainboard. FLUX Support Team September 01, 2021 05:55 Updated Solutions- Restart the laser machine. Update to the latest Firmware. If none of the steps above helped, please contact FLUX Support. Related articles 7-1 Warranty 5-2-12 #401 Critical Error: Mainboard offline. #905 Error when connecting to the mainboard. 5-2-7 Material cannot be cut through 5-2-5 #904 Homing Failed Comments 0 comments Please sign in to leave a comment.