Discussion about the Korg PolySix synthesizer

it appears from many recent posts that a very common issue with the 
Polysix  after battery leakage is that certain LEDs stay on all the 
time. Commonly the patch selection ones, but others as well. Now a few 
people (including myself) have replaced IC 30 and 31  but this hasnt 
helped. Aparrently digging out corroded traces doesnt solve the problem 
either... Thus I will propose that the problem is UNWANTED 
CONTINUITIES. The pushbutton switches stay on..or is it that they are 
bypassed and the LEDs light up because they get current regardless of 
the switch position.  Can the battery acids, if they are indeed 
conductive , actually soak into the plastic board? Would there be a way 
to literally SOAK the board in a neutralizer that wouldnt hurt the 
chips etc? any other thoughts?