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Taurus61
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Message 1 of 4
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error 511 cpu fan on boot pc

HP Recommended
Pavilion 500 PC Series
Microsoft Windows 10 (64-bit)

When I power on the PC the display shows the message : "511 cpu fan not detected" but if I skip this step the PC starts normally with no problems. I checked then cpu fan and it works well. Can I do anything to solve this boring message? Thank you

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Grzwacz
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HP Recommended

Hi,

 

I would reseat the fan connection on the motherboard (MB).

 

Reset the BIOS to defaults. Then reset CMOS.

 

Replace the CPU fan if possible.

 

The MB fan sensor may be failing.

 

Regards

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Taurus61
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Message 3 of 4
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HP Recommended

"I would reseat the fan connection on the motherboard (MB)"
How can I do this?

How can I to access in the BIOS?

 

Thank you.

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Grzwacz
Level 12
Level 12
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HP Recommended

Hi,

 

Reseat the CPU Fan Header:

 

You have to remove the side panel when the PC is off and disconnected from AC power.

 

Depress the power switch after disconnecting from the AC outlet to drain residual power from the motherboard before working on the motherboard.

 

Locate the CPU fan cable that is connected to the CPU fan motherboard (MB) header.

 

Disconnect this fan connector from the MB. Reconnect the CPU fan cable to the MB CPU fan header.

 

Access the BIOS:

 

Start the PC and tap "ESC" at boot.

 

Select "Setup".

 

Select "Apply Defaults and Exit within the File menu in the BIOS.

 

You have a motherboard fan sensor problem or fan problem if the above steps fail to fix the issue.

 

Next step is HP Support or a local PC technician.

 

Regards

 

 

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