Discussion about the Korg PolySix synthesizer

So, really, anyone with experience please jump right in and give some 
insight because I'm near my wit's end.  It makes me very nervous to 
remove the processor everytime I take out klm367 to work on it.

So, I have new sockets in there for ICs 30 and 31.  I have brand new 
wire making every connection from IC 31 and R 17.  I checked every 
connection to make sure they're good.

What's happening is that nothing related to programming a sound works 
or responds to a knob turn or switch switching.  When I turn it on 
and off it gives me a light show on the patch panel then selects a 
random patch with alterations.

Why would this happen?  Why after months of working fine, all of a 
sudden I get this crap?