There was no patient involvement.(b)(4).A livanova field service representative was dispatched to the facility to investigate the device and could confirm the reported issue.He traced the failure back to the inverter board of the touchscreen, in particular to the coil.Since this type of board is obsolete, the technician replaced the touchscreen and the associated parts.The issue was solved.Subsequent functional verification testing was completed without further issues and the unit was returned to service.
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