![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)
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 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
![Come riparare su un notebook HP l'errore System Fan (90b) cooling fan not operating correctly - YouTube Come riparare su un notebook HP l'errore System Fan (90b) cooling fan not operating correctly - YouTube](https://i.ytimg.com/vi/4Yhz67S-W9I/maxresdefault.jpg)
Come riparare su un notebook HP l'errore System Fan (90b) cooling fan not operating correctly - YouTube
![Advisory: HP ProBook 645 G1 and HP ZBook Mobile Workstations - Intermittent System Fan (90B) Error During POST, Computer Shuts Down | HP® Customer Support Advisory: HP ProBook 645 G1 and HP ZBook Mobile Workstations - Intermittent System Fan (90B) Error During POST, Computer Shuts Down | HP® Customer Support](https://support.hp.com/doc-images/308/c05318861.jpg)