Duo headlight system (90620us) was returned for evaluation: device history record (dhr): the dhr was reviewed and shows no abnormalities related to the reported issue.Failure analysis: upon evaluating this unit, it was observed that when the unit is powered on, the fan turns off/on whenever the end of the power cord is moved.There was an short at the end of the cord that is causing the fan to turn off/on, which will cause the light to flicker because of the unit overheating; the power cord has been replaced to correct this issue.Root cause: the reported complaint is confirmed.The returned 90620us headlight is in used condition with damage to the power cord due to rough handling/environmental damage.The issue of a short refers to this damage.No additional risk was incurred by this damage.No further investigation required based on the acceptability of risk and no adverse trends identified.This will be monitored and trended going forward.
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