You'll almost certainly find that C25 is no longer a capacitor and needs re-forming or replacing. Old electrolytic caps lose the insulating layer on the plates/foil over time if not used, and act as resistors instead. If power is applied they can explode due to a build up of pressure caused by electrolysis.
There are ways round this, using a variable voltage supply to bring it back to life slowly, or a "proper" re-forming unit that applies pulsed DC in an attempt to re-form the aluminium oxide insulating layer.
Chris.
|