> Is there anything you should learn from ;-)

Some of the capacitors here and there were almost dead so we had to be replaced them all.

> Did you replace them with the same type

Yes, the technician replaced them one by one with the same type/size new capacitors. Also, as the most of the ICs are socketed, we also replaced them one by one with new same type ICs and the issue remained the same.

> In general recapping in 30 years old synths is not required beside > a few exceptions: 1.) Tantalum capacitors. 2.) Caps in the power
> supply, if they are close to the regulators heat sinks.

> Recapping of the audiopath makes sense in large professional mixing
> consoles, which ran continously for 30 years 24/7 without beeing
> switched off. In these consoles the continuous heat inside the
> console can dry out the capacitors. But a synth usually never
> "lives" under such
> conditions.

I agree, I have only replaced the capacitors on power supplies, of my old synths, but in this case we had to replace them all.

What do you suggest to check