G4:21apr2021; b4:26apr2021.The service technician reported that the reported phenomenon was confirmed through operation checking.By doing parts-replacement investigation, it was identified that the phenomenon was resolved by replacing the power management (pm) board.The power management board was replaced under voluntary recall.The service technician reported when battery performance testing was carried out, the power was observed to turn off in the middle due to battery deterioration.The output of the battery was measured, and the result was that it was 0 v.In addition, the event log revealed that diagnosis code (internal battery failed) had occurred.Although there was no reproducibility despite operation checking, the lithium-ion battery was replaced due to deterioration and as preventative maintenance against recurrence.Submission of a report does not constitute an admission that medical personnel, user facility, importer, distributor, manufacturer, or product caused or contributed to the event.
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