Tim & Group, All of the keys work now. We now have two geniuses!!!! Problem is the keyboard is 30 miles away. I assume I need the version letter of the CEM chips? How to pick the problem CEM IC? Mr. Transistor PM'ed me, and I sent him this way to test this way as well: Press one key, hit the chord m...

Rasputin, You seem to be the AX80 genius. My needs are likely hardware. I am an electronics tech. I am trying to fix an AX80. Cleaned and applied conductive rubber to switches. All switches good. Problem is keys with no sound. It is always 8 keys apart. And it is funny that the sequence will "slip"....