The autopulse platform (s/n (b)(4)) was returned to zoll for evaluation.Historical complaints were reviewed for service information related to the reported complaint and there was no previous history of complaint reported for autopulse with serial number (b)(4).Visual inspection of the returned platform was performed and found that the top cover, front enclosure, bottom enclosure and battery lock were damaged.Additionally only half of display was working thus confirming the reported complaint.The autopulse platform is a reusable device and was manufactured on 03/04/2008.Therefore, this type of physical damages found during visual inspection is characteristic of normal wear and tear for the life of the device and is not related to the reported complaint.A review of the platform archive was performed and there were no problems found in the internal log.The platform was functionally tested and there were no problems or error messages noted.Unrelated to the reported complaint, further testing showed that the drive shaft was stiff when rotated.The clutch plate was deburred to address the stiff drive shaft.In summary the customer's reported complaint that the half of the platform display was working was confirmed during visual inspection but not during functional testing.The lcd display was replaced.There were no device deficiencies found during evaluation of the returned platform that could have caused or contributed to the reported complaint.Therefore, the exact root cause could not be determined.After replacing the lcd display, the platform passed all final functional testing criteria.
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