Thanks for your returns!
In fact I have contacted Apple in order to obtain something but their proposal was to buy new one. Even local Apple authorized repairer, contacted by phone, don ´t want to sale detailled parts (whatever the model of Time capsule)
Concerning the analysis component by component, I don't know to do but I will read the topics about this du ring vacation. And I will contact Vis as proposed by oldturkey03 even if the price is not so competitive (for this price I wonder if I can't find an old TC with dead hard disk)