A common failure mechanism in old electrolytics is that the electrolyte leaks and the ESR increases and the capacitance eventually drops.
Replacing old electrolytics is a common practice to restore old electronics equipment. Definitively start with the power supply ones, because of high ripple current they are the first ones to fail.
The bonus is that new electrolyte formulations are superior to what was available in the old days.
Replacing old electrolytics is a common practice to restore old electronics equipment. Definitively start with the power supply ones, because of high ripple current they are the first ones to fail.
The bonus is that new electrolyte formulations are superior to what was available in the old days.