Had a visitor to my Lab that asked how I managed to get parts to keep the 20-year old Pentium Pro Tower going. I've replaced the CD reader, nothing else. Well-made electronics can last for a long time. I have a World War II Triumph Oscillograph on the same bench. I had to clean the tubes on it and replace a bakelite dial. The WW-II Infrared Scopes, cleaned the battery contacts.