The discarded router does not die in a single moment of failure; it undergoes a slow, chemical surrender. To the casual observer, it is a plastic husk containing a green fiberglass plane, but to the naturalist, it is a landscape of evaporating seas and crystalline forests.
The primary engine of this decay is the electrolytic capacitor. These components, essential for smoothing the ripple current of the power supply, rely on an aluminum foil anode etched to increase surface area, coated with a thin layer of aluminum oxide ($\text{Al}_2\text{O}_3$) as the dielectric. This dielectric is kept in contact with the anode by a liquid or gel electrolyte, typically a mixture of ethylene glycol or boric acid. Over years of thermal cycling—the rhythmic heating and cooling of the processor—the electrolyte begins to evaporate through the rubber seal of the capacitor's vent. This "drying out" is a slow attrition of the component's physical state. As the liquid vanishes, the Equivalent Series Resistance (ESR) rises, and the dielectric layer may develop microscopic voids. The router begins to struggle; the power becomes "noisy," the signal jitters, and eventually, the device fails to boot. It is a death by dehydration, where the capacity to hold a steady state simply vanishes into the air.
Yet, in the silence of the landfill, a more sinister process begins: the growth of tin whiskers. These are not biological, but they behave with a mimicry of life. In the pure tin solder used to bond components to the board, internal compressive stresses—created during the plating process or through thermal expansion—drive the metal to migrate. Spontaneously, microscopic, single-crystal filaments of tin begin to grow from the solder joints. These whiskers, often only a few microns in diameter, reach out across the insulating gaps of the PCB like the hyphae of a fungus.
When a tin whisker finally bridges the gap between a high-voltage rail and a sensitive data line, it creates a parasitic short-circuit. The router, which had been dormant for years, may suddenly experience a surge of current that welds the whisker into a permanent bridge. The machine does not wake; it merely burns in a localized, invisible fire.
Thus, the router's afterlife is a transition from a tool of communication to a specimen of metallurgy. It is a body that, having lost its fluid, begins to grow crystals in the dark, waiting for a single, accidental connection to complete its final, destructive circuit.