My GREATEST appreciation to Nektar support! The faders of my Panorama P6 keyboard began to work very strangely. One of them had a sort of an "exponential" curve, no more linear. I contacted Nektar support, and they suggested an total hardware reset of the keyboard, that however did not solve the problem. At this point, they sent me a replacement for the faders board. I opened the keyboard, changed the board in a breeze and now the keyboard is working normally, as new!