I had not used it for a couple of months.
Now I connected it again and it flashes all its buttons and does not respond.
It is powered by its own supply, connected via a powered usb hub, which also powers my nektar Lx49 kbd, the dongle, my RME babyface externally powered and a stick with projects.
Having in mind that the cc121 is power hungry this would not be a solution.
I plugged another powered usb hub to the first usb hub and connected the cc121 there alone.
So far it seems to be working in this manner