by Y-my-R » Mon Nov 12, 2018 11:41 pm
I don't know if I can help, but I have a functioning 'old' C4 sitting next to my d8b, to extend the d8b's functionality while in controller mode with the ProBox.
If there's anything you'd like me to try, Raúl, let me know.
Did you maybe try to update the firmware by sending MIDI/SysEx to it, but it got interrupted before it finished? Or did it start showing that "update mode" all of a sudden, and for no reason? If so, I'd just try to run the update again.
...and even if you didn't try to update, maybe the firmware got corrupted somehow, and could potentially be fixed by playing a firmware update into it via MIDI, that should be available when you follow one of the links Anders shared...
Not sure what the latest firmware version is... I'm on V1.02. Let me know if there's anything you want me to try on my C4, to test/compare.