Archive of the former Yahoo!Groups mailing list: Korg Poly800/EX800 Users

Yes, that's what the step sequencer looks.

You can check the sequencer switch. Check out the schematics in the files section for help on tracing the specific matrix lines that work with the sequencer enable switch.

It could be that the matrix scanning chips are no good but that doesn't happen often. If your synth is making sounds check to see if one of every eight notes doesn't work. That's a good indication of a chip problem in the matrix keyboard scanning. If all of the note keys make sounds then it could be a bit more tricky to figure out. Sometimes the DTC devices fail.

Did your Poly display like that before you put the battery conversion in place? If is was OK beforehand then I suggest you double check all of work and check for any solder fragments or blobs that may have been dropped while you were doing the battery install. Also check to see if you broken or bent any pins on the cable assemblies when you did the work. Also check for any broken wires in those cable assemblies.

/Mike