Our fse was on site and could narrow the issue down to the contaminated printed circuit board.The origin of the liquid is unknown.After replacing the damaged part, the ventilator passed all functional and safety tests and was returned for clinical use.The replaced part was not required for further investigation.Ingress of liquid/corrosive substance on printed circuit boards can cause failure/short circuits that might lead to a ventilator malfunction.Since no parts could be investigated further, the root cause of the issue has not been determined.
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