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The device was received at the local service facility for investigation.The technical service report indicates: "test contents: the symptoms you requested were not confirmed result: the symptoms did not recur during the operation." probable root cause: cables, connectors, digital board, power supply, filter / fuse, ac inlet board, main board, transition board, fiber board, intermittence between transition board and ch connector, software, scope, light source, camera head (sensor, sensor cable), coupler (dust on optics, scratched optics, broken / shifted lenses, focusing mechanism, endoclamp, zoom ring), 1488 & 1588 extension cable, intermittence while using rf devices (ex: valleylab), problem toggling light source or from camera head, connected monitors, leaking, use error, poor grounding (e.G."finger" grounding tab connecting front and rear enclosure.Camera head connection from cable to transition board.), electromagnetic interference (emi) from rf communication, hf surgical instruments, esd, or power surge, manufacturing/ service nonconformity, the reported failure mode will be monitored for future reoccurrence.
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