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Advisory: HP ProBook 645 G1 and HP ZBook Mobile Workstations - Intermittent System Fan (90B) Error During POST, Computer Shuts Down | HP® Customer Support
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FIXED - The system has detected that a cooling fan is not operating correctly || System Fan (90B) - YouTube
![Why is my HP laptop showing "System Fan (90B)" error even after cleaning the fan with compressed air? - Super User Why is my HP laptop showing "System Fan (90B)" error even after cleaning the fan with compressed air? - Super User](https://i.stack.imgur.com/BfnNw.png)
Why is my HP laptop showing "System Fan (90B)" error even after cleaning the fan with compressed air? - Super User
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HP System Fan 90B Error Fix😎 |The system has detected that a cooling fan not working properly - YouTube
![Why is my HP laptop showing "System Fan (90B)" error even after cleaning the fan with compressed air? - Super User Why is my HP laptop showing "System Fan (90B)" error even after cleaning the fan with compressed air? - Super User](https://i.stack.imgur.com/1kkP2.jpg)