Additional information provided in sections d.9.H.3.H.6.And h.10.The service history was reviewed for the system.No service record relevant to the complaint reported event was found.However, the lamp was returned on this investigation for evaluation.A manufacturing device history record (dhr) review was performed prior to product release to ensure that the product was manufactured in compliance with the device master record.Based on the assessment, the product met release criteria.A non-conformance-based review of the batch/lot/serial number was performed and a potential contributing factor to the reported complaint was identified.The internal investigation was opened but was later determined to be irrelevant to this reported event.The lamp was received for this investigation.A visual assessment of the returned sample revealed no obvious nonconformity.Sample testing of the returned part was performed.The lamp was installed into a system, and no system message displayed and there was no problem found.The reported event was not replicated.The system was found to have no problem.Therefore, the root cause of the reported event is inconclusive.The manufacturer internal reference number is: (b)(4).
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