Internal complaint reference (b)(4).The reported device, intended for use in treatment, was received for evaluation.A visual inspection was performed on the product and no issue was observed.There was a relationship found between the returned device and the reported incident.Product failed functional testing with alarm sounding and "short circuit detected" error message on port a only.Cause of alarm and error is shorted electronic components on the main digital pcb.Resistor r54 was observed to be burnt.Product passed functional testing with a known good main pcb installed.The complaint investigation has concluded the cause of the failure to be defective electronic components.A review of the device history records showed there were no indications to suggest that the product did not meet manufacturing specification or would not be able to perform as intended.A complaint history review concluded this was a repeat issue.No containment or corrective actions are recommended at this time.
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