G4:24aug2020.B4:21dec2020.The reported issue occurred during pre-use system check.The customer had a standby ventilator which was immediately connected to patient and there was no delay in therapy.A philips service engineer (se) evaluated the device and was unable to replicate the reported issue.The se replaced central processing unit printed circuit board assembly (cpu pcba) for preventative measures.G4:17dec2020.B4:21dec2020.The replaced cpu pcba was returned to the failure investigation lab(fi).The cpu pcb assembly was installed into known good test ventilator and all test protocols were performed.The customer complaint was not verified.No failures occurred during testing.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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