Auth‑Florence MPS‑1 is a nurse call station that integrates a push‑button interface with an annunciator panel and internal power supply. Common failure modes for this model include burned or tripped relay contacts, degraded push‑button switches, and blown fuse or capacitor failures in the onboard power section; similar industrial intercom units also suffer from loose wiring to the phono jack or damaged LED indicators. Begin troubleshooting by verifying the 24 V DC input voltage at the unit’s front panel, inspecting the internal fuse and electrolytic capacitors for signs of damage, and checking continuity on the button contacts and relay coil connections; if error codes are displayed, review the station’s diagnostic register for fault flags.[oss-gpt-20b]