The autopulse platform (s/n (b)(4)) was returned to zoll for evaluation on february 5, 2016.Investigation results as follows: device history record (dhr) was reviewed and no previous related complaint was reported for this autopulse platform (s/n (b)(4)).Visual inspection of the returned platform was performed and upon power-up, the display was observed to be distorted.Additionally, the battery lock clip was bent and the front enclosure was damaged.The autopulse platform is a reusable device and was manufactured on october 2007.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 unrelated to the reported complaint.A review of the archive was performed and no discrepancies were observed.Upon power up the autopulse screen was distorted and looked like it was displaying a different language.Therefore, functional testing could not be performed.The distorted screen was attributed to a defective lcd display.Based on investigation, the lcd display, bent battery lock clip, and damaged front enclosure were replaced.Additionally, as a routine service, the power distribution board was also replaced.In summary, the reported complaint was confirmed during visual inspection and functional testing.The root cause for the distorted autopulse display screen was the defective lcd screen.After replacement of the parts identified during investigation, the platform passed all final functional testing criteria.A definitive root cause for the defective lcd display could not be determined.All autopulse platforms go through a thorough inspection and test prior to and during final inspection to ensure visual, structural, and functional integrity.Therefore, the defective lcd screen could potentially be due to normal wear and tear and/or physical abuse.Additionally, a li-ion battery (s/n(b)(4)) returned with the platform was successfully charged and passed charger testing indicating that the distorted lcd screen was not due to battery issues.
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