The DUKANE 110‑2311 Nurse Call Bell is a fixed‑site communication device that delivers audible alerts via an internal speaker and LED indicator when a patient’s call button is activated. Common failure modes reported for this model include board or drive malfunction, resulting in no sound or intermittent operation; power supply issues on the 12 V input can also cause loss of function. Initial troubleshooting should verify the unit’s 12 V DC supply continuity, inspect the main PCB for burnt components or loose connections, and confirm that the speaker and LED are operational by applying a test signal through the output terminals. If those checks pass, review any error codes displayed on the status panel and perform a short‑circuit test of the call button contacts.[oss-gpt-20b]