G4: 19oct2020.B4: 20oct2020.The device was not in use at the time of the event.There was no report of patient or user harm.The device was evaluated by the customer with assistance from a philips remote service engineer (rse).The customer stated that the battery date was 2014-11, and verified there was no charging voltage from the pm board to the battery.The rse advised the customer to replace the battery and pm board.The customer replaced the pm board and power harness cable to resolve the reported issue and returned the defective part to philips.The battery was also replaced as it was noted to be over 5 years old which philips recommends replacing every 5 years per the service manual.G4: 13oct2020 b4: 20oct2020 the power management board assembly (assy,pcb,pwr mgmt,v680) was returned to philips for failure analysis.Visual inspection revealed no anomalies.A failure investigation (fi) technician installed the power management board into a fi ventilator to duplicate the reported.During the unit testing the power management board was installed onto known good test unit, booted unit in normal operation mode with battery and ac to check for alarms and errors.The customer complaint cannot be verified.The test ventilator recognized presence of battery with returned power management board installed.No fault found.Submission of a report does not constitute an admission that medical personnel, user facility, importer, distributor, manufacturer, or product caused or contributed to the event.
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