Mega 2560 Pro (embed) resetting

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?


Make sure the USB cable is completely plugged into both the Arduino board and the PC.

You may have a damaged/defective or charge-only USB cable. Try a different cable.

It says on the photo: USB - TTL CH340G.
Have you installed the driver for the CH340G on your PC?
CH340G Windows Driver

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Sorry for beeing late....

Yes, cables changed, driver ist installed on all PCs I tested. No success.
I ordered a new MEGA Pro and will use this one.

Thanks for help, Subject closed!


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