No matter what you do it will all need servicing. Capacitors are perishable. Electrolytics dry up, solid (MLCC, polymer, tantalum, paper) dont like humidity (s

No matter what you do it will all need servicing. Capacitors are perishable. Electrolytics dry up, solid (MLCC, polymer, tantalum, paper) dont like humidity (some even require baking before soldering). Mechanical stress and temperature cycling leads to cracking of caps and solder joints. Mechanical parts will have stiction (hdd heads), dried grease. Plastic parts expand due to moisture (sprockets/cogs in FDD/CD), rubber bands liquify or dry and stiffen. Then you have vented helium/lost vacuum.