When recently Update firmware, after a long long time, I stop the update and my Keyboard S49 MK 3 display a blue screen ….
Thanks for help
@Collard If you haven't already, check the following: Kontrol S-Series MK3 Troubleshooting Guide
If that didn't help get in touch with our support here: https://bit.ly/NI_support_Kontrol
The update can take a long time. I mean, a LONG LONG time !!
Try power-cycling the keyboard five times. That should bring you to a recovery screen that will let you do an update. Assuming you get to that point and run the update again don't interrupt it for anything short of the world ending.