...
This issue is most likely caused by an unknown state of the motor controller that is related to the combination of the motor, motor encoder, and specific lens. Swapping the motor or the lens would typically fix this problem before the introduction of the firmware update.
Solution
Using InSpec
...
Classic
Using InSpec [ Classic], go to the Machine Menu> Upgrade firmware, and browse for the attached package.
Click Update and wait for the firmware upgrade to complete. Do not allow a power loss to occur during the upgrade process or the zoom board may be irreparably damaged.
When the firmware update is complete, close InSpec [ Classic ] and power off the machine.
Power up the machine and , open InSpec [ Classic] , and Initialize the machine.
...