do you think if i took the synth and found a manual online with schematics.. a decent electronics repair person could handle the job? or do I need to go out and search for someone who specializes?
I would make sure you goto someone who actually specializes in synths, rather than just your run of the mill "amp repair guy who works on the odd synth". And if you have the option, someone with CS-specific experience (even if more expensive) would be best... it could take someone without any CS-experience much longer to figure out the problem (costing you more money in the long-run)
p.s. it was me who suggested the potential for "logic" issues (there are many individual logic chips in one of these synths, and they seem prone to failure), but that was just based on a general (not technical) knowledge of what goes wrong on these... others will have much better knowledge of the problem based on the symptoms! good luck!