I recently shipped my KPA back to Germany due to problems with the LEDS.
One LED in the Volumen was all black and both input and master plus a stomp looked like it only got sidesplash from neighbour light. I read about the LED problem and I was pretty sure about what was going on here.
When it came back it was all good but it had had a factory reset so I gave it the backup I made before I send it.
And except for the black LED it was all back again.
I felt a bit foolish. It was a softwareproblem that had kept the multicolourLEDS from working properly.
A system reset was all it took.
I feel obliged to share this despite all my feeling a bit stuppid.