The reported event of "the autopulse platform (sn (b)(4) made clicking sound and the lcd display went blank when the user powered on the platform" was confirmed during the functional testing.The root cause for the device failed during power-on self-test was due to the defective processor pca (printed circuit assembly) board.Upon visual inspection, observed cracks on the front cover, unrelated to the reported problem.The physical damage was appeared to be due to user mishandling.The autopulse platform failed initial functional testing due to defective processor board.The processor board was replaced to remedy the issue.As part of routine service during testing, the platform was examined and unrelated to the reported complaint, user advisory (ua) 27 (encoder fault) was noted.The encoder indicated that the drive shaft was turning too fast at the speed higher than 3000 rpm during compression due to the defective encoder.The encoder gearbox was replaced to remedy the issue.Following the 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.Historical complaints were reviewed for service information related to the reported complaint and there was no similar complaint reported for autopulse platform with sn (b)(4).
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