If the MM712 lost connection after firmware update, please check the following troubleshooting suggestion:
- Unplug and re-plug dongle to the PC and connect the MM712 under 2.4 GHz mode again.
- Repair the MM712 by the steps found here.
- Double check if the MM712 had been update to the latest version completely.
These steps may resolve the issue, if don’t, please contact [email protected] for more help.