Disabling CPU fan speed control in the BIOS. Only the fans are working? Linus Media Group is not associated with these services. Press F1 to boot. 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!! ! Fan is the original Dell unit. Press F10 to save changes and exit. Figure: Check the fan power cable connection. How To Fix A CPU Fan Error! How to Remove CPU Fan Error on Boot? Press F10 to save changes and exit. This will disable the sensor and allow you to boot normally. What is causing this message please. In this case, you need to change the fan settings first. Why do I keep getting this when I turn on my desk top? My cpu fan problem was a little different. Sign Up; Forums All Activity My Activity Streams Recently my computer has message 511-CPU Fan not detected. Thanks. This thread is locked. CPU Fan not Detected (900) CPU Fan is not detected or may have malfunctioned. VisiHow QnA. PC won't start up. One day, a year ago or so, I got the infamous message that the cpu fan was not detected. Want to join in? Boot into your BIOS. To resolve the error, take the following steps: Press Enter to clear the message and allow the system to boot to the Windows desktop. * "CPU Fan Speed Low Limit" appears only when you set the CPU Q-Fan Control to [DC Mode], [PWM Mode], and [Auto]. I get the 511 cpu fan not detected and press F1, yet when the computer boots up, the fan is running. ... Exit the BIOS and boot the system. My model is Pavilion 510-p040qe I tried to search for it but not found. 3. Did so and it did. This section is not written yet. It has F1:Boot. 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 . - 6786035 Some devices may only have a CPU fan or only a chassis fan. After a few months, I took off the side panel to watch the fan. Make sure the fan power cables are connected firmly to the motherboard. Solved: How can I get the part information for the replacement fan? I press F1 then can continue to sign in and use my computer. Click EDIT to write this answer. 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. Figure: Common fan locations inside an HP desktop computer. Shut down the computer, and then inspect and clean the exterior vents to remove dust buildup by blowing air through the vent openings. Once on the Monitor tab, set the CPU Fan Speed from N/A (Not available) to IGNORE. You can follow the question or vote as helpful, but you cannot reply to this thread. 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