G4: 08jul2020 b4: (b)(6) 2020 the user interface (ui) assembly was returned to failure investigation (fi) for evaluation.Visual inspection of the user interface assembly revealed no evidence of damage or contamination.The user interface assembly will be installed in the fi test ventilator in an attempt to duplicate the reported problem.The determination could be made that the device failed to meet specifications.The device was not being used for treatment when the reported event occurred, and there is a relationship of the device to the reported problem.The burn out cold cathode fluorescent lamp (ccfl) backlight causes the dim display.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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