A medtronic representative reported that, while in a procedure, the site's navigation system unexpectedly became unresponsive during patient registration.In trouble-shooting, shutting down the navigation system and re-starting did not resolve the issue.Confirmed electricity in monitor and computer, however, nothing indicated on the monitor screen.The navigation system was powered off once and the computer was checked.The cover of the computer was opened and graphic board was re-plugged.When the computer was then powered on, indications on the monitor screen were confirmed.It was deemed likely that the graphic board was worn out.The surgeon opted to continue and completed the procedure without the use of the navigation system.There was no delay of therapy.There was no impact on patient outcome.
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