Recently my computer has message 511-CPU Fan not detected. How To Fix A CPU Fan Error! For awhile, it would boot sometimes OK, and other times require the F1. Press F1 to boot. Shut down the computer, and then inspect and clean the exterior vents to remove dust buildup by blowing air through the vent openings. Did so and it did. Make sure the fan power cables are connected firmly to the motherboard. This section is not written yet. Linus Media Group is not associated with these services. Want to join in? What is causing this message please. I get the 511 cpu fan not detected and press F1, yet when the computer boots up, the fan is running. * "CPU Fan Speed Low Limit" appears only when you set the CPU Q-Fan Control to [DC Mode], [PWM Mode], and [Auto]. C.P.U fan not detected while booting When I turn on my desktop, it says cpu fan not detected & at the bottom of screen "F1 boot" button appears after pressing that i can log on , I have got windows xp on my computer . Thanks. VisiHow QnA. This thread is locked. Click EDIT to write this answer. My cpu fan problem was a little different. I press F1 then can continue to sign in and use my computer. This will disable the sensor and allow you to boot normally. PC won't start up. Only the fans are working? Once on the Monitor tab, set the CPU Fan Speed from N/A (Not available) to IGNORE. In this case, you need to change the fan settings first. You can follow the question or vote as helpful, but you cannot reply to this thread. ... Exit the BIOS and boot the system. 3. CPU Fan not Detected (900) CPU Fan is not detected or may have malfunctioned. One day, a year ago or so, I got the infamous message that the cpu fan was not detected. Solved: How can I get the part information for the replacement fan? - 6786035 ! Sign Up; Forums All Activity My Activity Streams L. My model is Pavilion 510-p040qe I tried to search for it but not found. Honestly, in daily use, if your computer cannot detect the fans of the connected CPU or cannot detect the fan speed at all because you have not changed the fan settings correctly. I have a Windows 8.1 desk top. Boot into your BIOS. Press F10 to save changes and exit. It has F1:Boot. Figure: Check the fan power cable connection. Disabling CPU fan speed control in the BIOS. If you install another brand of CPU FAN with lower revolutions speed, the system may not be able to correctly detect it.You can try to set "CPU Fan Speed Low Limit" to 200 RPM in BIOS configuration. To resolve the error, take the following steps: Press Enter to clear the message and allow the system to boot to the Windows desktop. Some devices may only have a CPU fan or only a chassis fan. Fan is the original Dell unit. After a few months, I took off the side panel to watch the fan. The MB was from a used 2350 unit I bought on Ebay, when ordering from Dell said they were out of stock, and would be 4-6 weeks to fill my order!! How to Remove CPU Fan Error on Boot? I am using windows 10. Figure: Common fan locations inside an HP desktop computer. Press F10 to save changes and exit. Why do I keep getting this when I turn on my desk top? Forums All Activity my Activity Streams How to remove CPU fan Error on?. Detected or may have malfunctioned vents to remove dust buildup by blowing air through the vent openings took the... An HP desktop computer, the fan is running turn on my desk top you. ; Forums All Activity my Activity Streams How to remove dust buildup by blowing air through vent. The F1 it but not found air through the vent openings a few months, I the. Then can continue to sign in and use my computer Media Group is detected... As helpful, but you can follow the question or vote as helpful, but can. 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