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- HP Community
- Desktops
- Desktop Hardware and Upgrade Questions
- 901 -PCIe blower fan not detected

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06-24-2025 08:10 AM
Hi @Sanju_accel
Welcome to the HP Support Community!
Thanks for posting your query! We're here to help you get back up and running.
The "901 - PCIe blower fan not detected" error indicates that the fan responsible for cooling the PCIe slots may not be connected or has malfunctioned. Here are the steps to resolve this issue:
Reseat Fan: Ensure that the fan is properly seated in its slot. Sometimes, the fan may become loosely connected due to vibrations or improper installation.
Reseat Fan Cable: Check the fan cable connection to the system board. Make sure it is securely connected and there are no bent or damaged pins.
Replace Fan: If reseating the fan and its cable does not resolve the issue, the fan itself might be defective and needs replacement.
Follow these steps to secure and check the connections to eliminate the error.
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Regards,
Hawks_Eye