The customer reported that he had just turned off the ventilator after testing it when all of a sudden, he heard a "hissing noise" and then smoke started coming from the vent (middle).The unit was still plugged in to wall ac, but the vent was powered off.It lasted only a few minutes.He could not tell where the smoke was originating from, but when he removed the back column, he noticed black smoke residue along the top portion of the column.No pt involvement.
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Carefusion's failure analysis laboratory (fa lab) received two suspect components for evaluation.The first component was the power driver module but it was received with electrostatic discharge protection, so the device was unable to be evaluated.The second component was the power cable sub-assembly and visual inspection identified a capacitor was burnt out, confirming the reported issue.The fa lab was unable to determine a root cause of the reported issue due to lack of material to find the cause of the blown capacitor but is being considered to be related to material fatigue.
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