Vintage Synth Repair

I bought my Arp Odyssey in 1979, III model, and used it live until I
went MIDI in about 1985. I put it in an Anvil case and it's been
stored since. I always remembered it in a positive view and sometime a
few years ago started thinking about firing it up again. I finally
pulled it out and hooked it up. The power light comes on, but no sound. 

I haven't been able to find a synth repairman in San Antonio, TX that
will work on my Arp. I am not a heavy electronics person. I can solder
a cord, but am a novice at following a schematic. 

Any recommendations? 

Thanks 

Mike