Like other Mac users with Apple Silicon CPUs may have experienced, if the Firmware Updater does not fullly do its job, the keyboard does no longer come up but instead displays a white screen.
After countless hours of testing forth and back, here is how I could get my S61 MK3 back to life despite it showing a white screen on bootup:
- I have power-cycled the device a number of times (around 10 - 20), with the white screen appearing every time
- Then I have connected the keyboard to the USB Charger of my Macbook Pro. After powering it on, the white screen was still there.
- For the data connection, I have used a USB-C to USB-A adapter and plugged the USB-A cable directly into the USB-A port on the back of my Mac Studio. The display was still white.
- I then launched the Firmware Updater and started it. The firmware updater got active although the device itself still showed nothing but the white screen. Letting it run for around 5 minutes, the firmware update suddenly reported success and the S61 MK3 lit up again, telling me that it downloads the firmware. Once finished, the screen went on to the "Default MIDI template."
Hope this helps.
Cheers
Tom