This report is being supplemented to provide additional information based on the legal manufacturer's final investigation.A review of the device history record found no deviations that could have caused or contributed to the reported issue.Based on the results of the investigation, the reported issue was caused by a failure of the igniter board.Since approximately eight years have passed since the device was manufactured, it is likely the igniter board failed because the electronic components of the igniter board, which are responsible for lighting control, deteriorated due to repeated use for a long period.
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