Well, I'll post into this two year old thread instead of creating a new one...
I have an SR-18 that (only) has static in one channel (left I think) - but not always just sometimes. I paid like $70 each way to send it to an authorized repair shop in LA/OC as I live in UT where there is no authorized repair shop, but they couldn't replicate the problem. Some online searches suggested cleaning a specific contact, replacing a transistor here or a capacitor there... but as this static in only one channel doesn't happen all times, they didn't fix this issue.
Does anyone know what the specific problem might be? Should I just take it to a top Salt Lake City non-authorized repair shop (if they regularly fix high end equipment, how different is a 25 year old Marantz SR-18?