Oberheim EDP problem

[Laurent Brondel <laurent@megalink.net>]

my oberheim edp is now constantly showing pulse activity on the input 
led (nothing is plugged in on the edp), and there is no sound coming 
through. all the looping functions seem to work as expected, there is 
just no sound. i cleaned the input and output pots with contact cleaner 
to no avail. kim, any idea? i suppose gibson still supports the 
oberheim branded edp's, yes? or is there a tech who knows those 
machines on the us east coast (i live in rural maine)?
thanks in advance,
laurent