A genuine vintage synth (broadly, 1970s-80s analog and early digital instruments) is a decades-old piece of electronics, and several specific components are known to fail with age - independent of how well the instrument was otherwise cared for.
Known risk points
- Electrolytic capacitors: these dry out over time; as they degrade their electrical resistance rises and can eventually stress or damage other, harder-to-replace components around them.
- Backup batteries: many instruments from this era used a small battery to keep memory/patches alive when powered off. Old nickel-cadmium or alkaline batteries are prone to leaking corrosive residue onto the circuit board beneath them - a well-known cause of expensive board damage if not caught and replaced in time.
- CMOS chips: some chip generations from the mid-to-late 1970s are known to be prone to internal degradation ("substrate rot") with a limited practical lifespan, and can fail outright with no repair option beyond sourcing a replacement chip.
What this means for buying
- Ask directly whether the internal battery has ever been replaced, and whether any board damage has been inspected for.
- Search synth-specific forums and communities for the exact model - known issues and typical failure points for popular vintage synths are usually well documented by enthusiasts.
- Budget for the possibility of a professional service/recap even on a unit that currently works fine, especially for anything not already serviced in recent years.
None of this means vintage synths should be avoided - many remain reliable for years with basic preventive maintenance - but going in aware of these specific, well-documented risk points avoids unpleasant surprises.
