The reported complaint of the autopulse platform (serial #(b)(4)) display of "realigned patient" and then it power off on its own were not confirmed during the initial functional test.The autopulse platform powered on but displayed user advisory - ua16 (timeout moving to take-up position), unrelated to the reported complaint.Unrelated to the reported complaint, a damaged front enclosure on the returned autopulse platform was observed during visual inspection.This type of physical damaged is likely attributed to mishandling.The front cover was replaced.Also found, the encoder drive shaft does not rotate smoothly, exhibits binding and resistance as a result of a sticky clutch plate.Deburring of the sticky clutch plate was performed to remedy the encoder drive shaft issue.The initial functional test failed due to user advisory - ua16 (timeout moving to take-up position).The root cause of ua16 was due to a damaged drive train.The drive train assembly was replaced to addressed the error message.After service completion, the autopulse was subjected to the run-in test using the 95% patient large resuscitation test fixture (lrtf) with good known test battery until discharged.The autopulse platform passed all the functional tests and it is ready for clinical use.
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