The CP‑45‑B is a solar‑powered fence charger that converts photovoltaic energy into a low‑impedance electric pulse to maintain livestock containment. Common failure points include degraded or cracked solar panels, depleted internal battery cells, and corroded grounding connections; the unit’s indicator LEDs often fail to flash when power is insufficient. First‑check diagnostics should verify panel voltage output under sunlight, test the rechargeable battery for charge retention (using a multimeter on the 12 V terminals), and inspect all wiring and ground straps for corrosion or loose contacts. If the charger still does not energize the fence, review any error codes displayed on the unit’s status display and perform a visual inspection of the internal PCB for burned components or broken solder joints.[oss-gpt-20b]