Kemper freezes when formatting USB stick

  • Hello. New here, just found this thread.

    I bought my first Kemper two days ago (secondhand). Seemed to work well.

    Today I plugged a formatted USB-stick in, pushed "Yes" when asked if I want to format it. Kemper froze. As no button seemed to work, I had to pull the power cord off the socket.

    Now, when I try to start Kemper - it does absolutely nothing. No sign of life. Any suggestions what to do? ;(