(b)(4).The device was returned and an evaluation was performed to investigate the reported event of other alarm.During visual inspection, no issues were found.The power on self-test and one hour therapy test were not performed successfully and event history was not downloaded because of alarm with no display.Upon conclusion of the investigation, the reported problem of other alarm was verified and the cause for the reported problem was due to defective digital printed circuit board (pcb).The digital pcb was replaced.Should additional relevant information become available, a follow-up report will be submitted.
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