I'm helping a friend to setup a flight sim cockpit. There is a switch panel with an Mega Pro which has a special firmware (ArdSimX) installed. We need to change to another interface, which is also based on the Mega.
So the plan was to reset the Mega Pro for the new sketch.
Unfortunately after plugging the Mega Pro to the USB port there was no "ding-dong" and the Port was grey. I'm using IDE 1.8.16, the Mega Pro was working before with no problem.
Any ideas? Driver problem?