Hi ! I own a K4 keyboard, too. But the 'main board' where is located the 'processor', RAM memories, main supply...crashed down. I replace a 'main supply' IC. 9 volts appears now, but the 'display' only shows some '%&$)((=?' characters, not sound, not MIDI signals, nothing. If someone can supply me this circuitboard, eMail me to: oficinacbuin@..., please. I am Eduardo Ibarra, Limache, V Regiòn, CHILE, Southamerica...Thanks in advance.
Message
Looking for a good condition K4 'mainboard'.
2007-02-18 by oficinacbuin