The reported complaint of "the lcd screen of the autopulse platform s/n (b)(4) was intermittently dark and unreadable" was not confirmed during functional testing and archive data review.During testing, no device malfunction was found, and the autopulse platform functioned appropriately and as intended.Visual inspection of the returned autopulse platform revealed a damaged front enclosure and a bent battery lock, unrelated to the reported complaint.Based on the photo provided by the zoll service team, one of the handles of the front enclosure was observed to be broken/chipped near its screw fitting area.The observed physical damages were appeared to be the characteristics of harsh impact due to user mishandling.The front enclosure and battery lock were replaced to address the observed damages.A review of the autopulse platform archive was performed, and no significant discrepancies were noted.The autopulse platform passed initial functional testing without any fault or error.During further testing, the customer's reported complaint could not be replicated, as the lcd screen was visible, bright, and readable at all stages of device evaluation.No missing pixels or lines were noted either.Unrelated to the reported complaint, it was noted that the clutch plate was sticky.Sticky driveshaft clutch area is usually caused by sharp edges from all 12-hex edges of the armature plate or due to burrs on the surface of the clutch rotor, likely attributed to frequent use of the device.The impact of the sticky clutch was not severe enough to make the autopulse platform non-functional.The clutch plate was deburred to remedy the problem.Following service, the autopulse was subjected to the run-in test using the 95% patient large resuscitation test fixture (lrtf) with good known test batteries until discharged without any fault or error.
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