Syed,
i have thought about this a bit more and also went into the ALC600 training modules and what i believe is happening is the main (MPU) for TCON is failing for some reason. Like i suggested in the email i sent back to you, genie tech support can help with this. But i might suggest running the update again and see if it will take. (unless the update program complains and says the unit does not need to be updated). IF that is the case you will have no other choice but to call genie.

The TCON main is not responding during firmware update. Does anybody have a solution? please advise.

Hi, The Genie Model is S-85 XC, Serial: S85XCH-985. I've tried to update the software (Bootloader 1302967-1.7.1 and Firmware 1302966-1.9.5) via USB. The Bootloader successfully installed and during updating of Firmware DISCON, PCON main, PCON secondary and TCON secondary successfully update 100% but TCON main not updating and showing message "Sub-ECU not responding try to recovery. I've checked wiring and CAN resistance on J5 and J10 connectors, all good.
Can anyone share the solution. Thanks in advance.