G4:23nov2020.B4:25nov2020.The user interface (ui) assembly was returned for evaluation.Visual inspection of the user interface assembly was received with damage to the touchscreen.A failure investigation (fi) technician installed the user interface (ui) assembly into a fi ventilator to duplicate the reported issue.During the unit testing the user interface (ui) assembly was installed in the fi test ventilator and it was found that a burnt out cold cathode fluorescent lamp (ccfl) backlight causes the dim display.Fault was found on this returned user interface (ui) assembly and the customer complaint was confirmed.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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