cancel
Showing results for 
Search instead for 
Did you mean: 
  • ×
    Information
    Need Windows 11 help?
    Check documents and videos on compatibility, FAQs, upgrade information and available fixes.Windows 11 Support Center.
  • post a message
  • ×
    Information
    Need Windows 11 help?
    Check documents and videos on compatibility, FAQs, upgrade information and available fixes.Windows 11 Support Center.
  • post a message
MJM76
New member
1 0 0 0
Message 1 of 2
156
Flag Post

511-CPU fan not detected

HP Recommended
Pavilion 550-126
Microsoft Windows 10 (64-bit)

About 10 days ago I received the 511-CPU fan not detected at startup with F1 boot at the bottom of the page. Hit F1 and system started successfully. Have not had any performance issues that I'm aware of since that incident. Opened the case today and found a dirty CPU fan that turned freely. Cleaned it with compressed air. Plugged the power cord back in and turned the unit back on. The other fans ran at startup but the CPU fan did not run.  I powered the unit off and unplugged the power cord. Plugged in the monitor and external hard drives and plugged the power cord back to the PC.  Got the 511 error message again. Hit F1 and system booted up just fine. Continues to run without any issues. 

 

Is this simply a bad CPU fan that needs to be replaced or could there be something else going on?  PC is almost 5 years old and sees daily usage with relatively light duty. 

 

Thanks for your thoughts!

1 REPLY 1
old_geekster
Level 16
Level 16
25,499 9,142 2,950 11,184
Message 2 of 2
Flag Post
HP Recommended

@MJM76 , welcome to the Community.

 

Without being able to inspect the fan, I believe that it is most likely the bearings failing.  Sometimes when dust gets heavy on the fan it can get into the bearings.  I suggest replacing the fan.

 

Please click the Thumbs up + button if I have helped you and click Accept as Solution if your problem is solved.



I am not an HP Employee!!
Intelligence is God given. Wisdom is the sum of our mistakes!!
Was this reply helpful? Yes No
Warning Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation