Carlos2021

Hi! I've got my wk-6600 a litle over a month ago. The higher octave dosn't play anymore. Configurations change at random. It is common for the keyboard to start transposed (A instead of C, por example) without the transpose sign on. In order to have a C at the C key, I must transpose. Rithm and tone are as set. the acompanying tones change. I have configured not to save the last adjustments. I have reset the system do factory defaults. Am I doing something wrong? What should I do?