When CPU fan is not working, the software will warn you. I have a client that purchased 8 HP 3500 Pro computer systems about 2 years ago. You can oil the fan bearing to make it work normally. CPU fan is a component, which might be broken after being used for several years. EDIT: You beat me by a minute on the CMOS. it suggests to me a faulty board. Yes I can enter cmos - the fan starts and stops immediately after being turned on. If CPU fan does not work, it may damage the CPU and even damage the motherboard, in which situation your computer will become unbootable. To clean CPU fan, you need to turn off the computer and open the case. PC frequently shuts down without any warning, which may causes system crash or data loss. After wiping dust or dirty on the fan, you can use some oil to lubricate the fan bearing.  Turns out the fan is a separate part. Take the Challenge ». Double check. Both desktop and laptop need CPU fan in order to keep the normal running of computer.When the CPU fan of desktop or laptop does not run, the methods to find the CPU fan and fix or replace it might be different. If your CPU fan is not install well on your motherboard, your CPU fan will also stop working normally, you just need to open computer case and install the CPU fan again to make it be installed perfectly on the computerâs motherboard. Also this situation can be caused by the contact problem, if the CPU fanâs power cord has a poor contact with the motherboard, the BIOS will also report CPU not working. When your computer has been used for a long time, it may contain lots of dusts. A fan with good heat emission protects the CPU from being overheated so as to protect your computer from sudden shutdown or even being corrupted. Buying a CPU fan, one of the most important things is its heat emission effect. I figured I had nothing to lose and was going to remove the assembly to bench test.  They made it very clear that the fan and heat sink were a single unit that needed to be replace at a cost of $150 etc. ask a new question. I tried resetting CMOS but it did not resolve the issue. The case fan was running normally. Which of the following retains the information it's storing when the system power is turned off? To continue this discussion, please When you open the computer, the fan on CPU is not moving.  It's not just a fan but also serves as a heat sinc so I've avoided swapping. OK.. so you don't want to swap the heat sink.. do you have another fan (out of any unit) that you could plug in to the power connecter and test? I would think any low draw case or cpu fan would work. This is a common problem which will happen during 1 or 2 years. Every time when you boot your computer, you can hear some noise, which is made by the CPU or case fan. I've tried the compressed air and reseating all cables. Therefore, it is very important to buy a proper and good CPU fan for your computer to avoid such kind of problem. HP P/N:667727-001. If following problem happens, you may check if the CPU fan is not working anymore: When CPU fan does not run, it probably causes many troubles, including: 1. When your computer working for a long time and the computer is in a high heat, but your still can not hear the CPU fan working noise. Then, you can use a small brush to wipe dust or dirty things on the fan. An expensive component like CPU, RAM, GPU, and Hard disk drive requires regular monitoring.Thatâs why you need to have the reliable best CPU temperature monitor for windows 10.. etc. If you've never replaced a fan before, take the computer to a professional. 1. You need to clean the CPU fan to keep it always clean in order to ensure the normal function of CPU fan. HP support was useless saying to replace the sync/fan for $150 but I don't think that's the issue. If your CPU fan stop working, it may also because the bearing of the CPU is stuck after a long time use. For me this was a trial and error, I noticed Geolocation Service was running, so I decided to disable it first. Cache is faster than using RAM because it's a physical part of the processor; ⦠for some reason ibuypower put the loudest possible cpu fan on mine, but that was the way my dad ordered it. This post includes the best program to monitor CPU and ⦠ I took one from a working system and it worked fine on the other system. Plug in the computer and turn it on. 3. Free programs to monitor system hardware in Windows 10 & 7 are useful tools to check the performance of computer hardware. You can install some computer inspector tool on your computer, which can inspect if all hardware or software works normally on your computer. Usually, if the CPU fan is broken, it will stop running. 2. 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