The autopulse platform (s/n (b)(4)) was returned to the manufacturer for evaluation.Investigation results are as follows: visual inspection of the returned platform was performed, which found that the load plate cover that affects the sealing had holes in it.Functional evaluation of the platform was performed and the customer's reported complaint of the backlight not working was not confirmed.The customer's reported complaint that the platform would intermittently stop was also not confirmed.Run-in testing with a 95 % patient test fixture was conducted for several hours and no faults or user advisories were observed.The autopulse platform passed all testing criteria.A review of the platform's archive was also performed and it was observed that no user advisory or warnings occurred on the reported event date of (b)(6) 2015.The last recorded date of customer usage was (b)(6) 2015.Based on the investigation, the part identified for replacement was the load plate cover.In summary, the customer's reported complaint was not confirmed.Review of the platform's archive data did not find any issues related to the reported complaint.In addition the reported complaint was not duplicated through functional testing.There were no device deficiencies found during evaluation of the platform that could have caused or contributed to the reported complaint.Therefore, a root cause could not be determined.After replacement of part identified during investigation, the platform passed all final functional testing criteria.
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