The Duake 4A3086A is a dual‑patient nurse call station in the Dukane ProCare 2000 family, featuring two pillow speakers and an integrated wall speaker intercom. Common failures on this model include blown input fuses or defective power supply modules, degraded speaker contacts or wiring, and board‑level faults such as burnt capacitors or failed ICs that prevent call detection or audio output. Begin troubleshooting by verifying the 24 V DC supply to the unit, inspecting all visible connectors for corrosion or loose pins, and checking the status LEDs for error codes; then test each speaker path with a multimeter or oscilloscope and review any stored fault logs via the station’s diagnostic interface.[oss-gpt-20b]