The 'other function' button is for using a preset JAVA APP. If there is no JAVA APP stored for the other function button, it will beep when pressed. The stored APP most likely was lost if the controller board was replaced.
One thing to bear in mind, if the JAVA card is removed while power is applied or is removed without stopping JAVA, there is a possibility that the controller board and the JAVA card will be toast.
My guess as to the scenario:An inexperienced tech went to update firmware and removed the JAVA card in order to use that slot for the card containing the update but did not STOP JAVA.
When power was reapplied, the controller was toasted and the tech was unable to update firmware.
Tech replaced the controller and updated firmware.
The first thing to do is determine if the JAVA card is operational. With the machine on for at least 15 minutes(this allows JAVA to load) and try to go to Extended Features.
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