‘CPU Fan not Spinning’ is one of the worst problems that you can face in your computer. Please remember to be considerate of other members. Then a blinking blue light comes on. If you're new to the TechRepublic Forums, please read our TechRepublic Forums FAQ. Fan on motherboard spins for a few seconds then stops, no boot. I updated the bios and as soon as the bios program began updating the bios, the fan kicked in at full speed until the bios was finished updating and then switched off again. Gain unlimited access to on-demand training courses with an Experts Exchange subscription. Remove all power to hard drives and Blu-ray drive. A bare system with RAM and a video card should POST and display the BIOS. on ... Also I assume your talking about the CPU fan correct? (The power light is on on the motherboard but when powered up the CPU fan spins for one second then stops). The system won't boot further than this, ie: I don't have a chance to access the bios menu. Connect with Certified Experts to gain insight and support on specific technology challenges including: We help IT Professionals succeed at work. Please note: Do not post advertisements, offensive material, profanity, or personal attacks. If it's clean from dust, the fan is in good shape and you're still having this problem then unplug the fan from the motherboard, close the panel and start the computer up. Thanks. New build, fans spin for a sec, shuts off! 2 B. bmc Honorable. Change the CMOS battery and see if it works. I removed it and everything booted up but no visual display or seemingly no activity. I plugged it in and all is well. the fans will spin for a second then stop. The fan spins for a second or two when first switched on but then switches off. It's good to narrow it down.That was a great idea to check the voltage switch, but it was set at 115. - I dusted the case, (it was not that bad anyway). ... and that stopped the fans from running at a high rate. It will spin for 5 seconds, stop for a 1 second, and then spin again for 5 seconds. We've partnered with two important charities to provide clean water and computer science education to those who need it most. I scrounged up a good PSU from someone and it did the same thing. Thanks for the comprehensive reply thoffman. hide. Alright, so I have an AMD system. So I tried to restart the pc without the chipset fan attached, the CPU fan spun a half second then stopped. With the ATX12V Plug disconnected, the CPU fan spins up fine and stays spinning, but the GFX card's fan does not spin, assuming the card isn't actually getting power here. I took off the back to ensure it was fully plugged in and it was. There is no beep however, and no video. I then turned the computer on by shorting the power jumpers. Below are the relevant specs: © 2021 ZDNET, A RED VENTURES COMPANY. I have returned the CPU and the Motherboard, both are new. All the case fans still spin and the computer continues to run for a few min then over heats and quits. Tried turning on the PC again. this action keeps repeating. If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Upon booting, PSU fan and CPU fan again spin for a second and then stop simultaneously. Tried turning the computer on again, by using screw driver to short the power switch pins. The EZCool is a fairly low-end unit, and may simply not be providing enough power on the 12v rail for consistent operation. The motherboard is an AM2+ system and the chip seemed to fit fine. Notice the CPU fan spins for half a second and stops. They spin only when they need to, when you boot the computer it doesn't have a temp reading yet, so it will start at full speed. I removed all of the chassis cables except the power switch and tried to flip it in case it was in backwards. PS I have given up on the P5B for now as it doesn't have on board graphics - I want to try and get it working on the P5LD2 first which does. The memory was also removed and each piece was tried in each slot. When I go to hit power, the fans spin a second and then stop. Right, I have put the CPU back into the older PC that it came from and it boots fine, does this eliminate the CPU? Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended. New workstation, fans spin for about 1 second then nothing - posted in System Building and Upgrading: Hi all and thank you once again for your precious replies. I tested the PSU with the paperclip method, the fan runs continuously. We're trying to determine if the new P4 3.4 cpu is at fault. I got a Predator Helios 300 PH315 - 51 a month ago. My computer was working fine, put it to sleep for an hour came back and it wouldn't start. Thanks for your help, but it has been a long two months and I am still stuck. The lights would come on, the fans would spin (case fan, cpu fan, power supply fan, video card fan). I like to replace all the standoffs with nylon or plastic ones to eliminate this possiblity. Or were some standoffs shorting the power supply?? I tested the PSU with a purchased PSU tester. All submitted content is subject to our Terms Of Use. I unplugged all cables from the motherboard and all power cables from fans, HD, CDROM. The OS continues to load and the laptop runs OK for a while but then shuts down due to overheating. I pushed on the Ram sticks and still wont work.. that same computer guy now said it was the PSU gone so he connected up a new PSU and the exact same problem happened.. so he said my motherboard is screwed and to buy a new PC from him. Thinking it was the fan itself, I got a replacement fan and swapped it out. Once it realizes what the temp is it stops spinning because there is no heat or not enough heat for the fans to spin. I am in the process of building a computer and ran into a snag. Our community of experts have been thoroughly vetted for their expertise and industry experience. PSU is most likley dead, use the warranty and RMA it. However, on further inspection, the fan spins a little then stops. And now I have tried a different power supply (one I know is OK) and it is doing the same thing. No such thing on all my previous single processor machines. Replacing the standoffs may be an issue. Controlling the CPU fan speed in your PC (or all the fans, in fact) is a way to give you more control over your Windows 10 experience. READ MORE. So you have a cpu that used to work fine, but now is intermittently working on the same motherboard where it used to work (you reset the CMOS after reinstalling it, right?). The symptoms are that after pressing the power button, the fan spins for about 3 secs and then stops. Move the other cpu to this motherboard and see if that works. I do not get any POST beeps. Good luck. Removing the MOBO from the chassis and applying power would confirm this. You can make sure that the system isn't too loud, with the fan only spinning up faster when your PC gets warm. Then if I continue to hold the power button, a blue light begins flashing. how to redirect internet via rasberry pi. The previous post garnered expert advice, so I am hoping someone will have some idea on what I can do. Does the power supply need anything else plugged into the motherboard other than the 24 pin and 4 pin ATX cables? I think you have a bad motherboard. Same sypmtoms persist. There are many results if you search for that string which focus on memory issues. Our community of experts have been thoroughly vetted for their expertise and industry experience. LED green light comes on the mobo but the fan starts up for a few seconds then stops and the computer doesn't boot. I changed the fan over but I still have the same problem. Microphone Only Picking Up Output Sounds (Desktop Audio). CPU fan spins for a second and stops. I've got an Acer Aspire 5332 laptop in for repair. P.S. Removed CPU heatsink and CPU to check pins: all pins look fine, CPU looks fine and installed correctly, etc. Since, then my computer won’t post. Being involved with EE helped me to grow personally and professionally. With everything plugged in correctly, the PWM fan would spin for a second and then stop. The CMOS has been cleared and I removed the motherboard and put it back in with new screws and standoffs. It might sound a little strange but it helped me. 100% Upvoted. I have tried the CPU, power supply and memory with another motherboard (Asus P5B) and sometimes the same problem occurs but sometimes it does seem to boot up - the problem is that with this motherboard (which doesn't have onboard graphics) as soon as I plug in a PCI-E graphics card the CPU fan spins for one second and then stops! The second best is to try a different power supply.I assume that the clear CMOS jumper is in the "Normal" position.Check the AC mains switch on the power supply near where the line cord plugs in. A friend got a new computer and gave me his quad core which I was hoping to put into my system. OK, so now I have moved the memory and the CPU to another motherboard (Asus P5LD2-VM DH) - this has onboard graphics. I'm 99% sure it's something to do with the graphics card - I had tried adjusting it to make sure it was sitting right and then it suddenly booted fine, but then started turning off again after I rebooted. It is like having another employee that is extremely experienced. If your CPU fan is not spinning, then it is a matter of serious concern because if your CPU heatsink fan suddenly stops spinning, then it will lead to overheating of the CPU. :(0 comments. Experts with Gold status have received one of our highest-level Expert Awards, which recognize experts for their valuable contributions. Codes 32-36 are CPU PEI initialisation. > a colleague has confessed that he fried the P5LD2 last week, https://www.experts-exchange.com/questions/22061341/CPU-fan-spins-for-one-second-and-then-stops.html, https://www.experts-exchange.com/Hardware/Desktops/Q_22060296.html#17942625. For a while I've been using a dual core processor. The fans actually go crazy, spinning at full force. I tested it outside the case, I tried a switch from an older computer, I took everything out that wasn't needed, I switched my custom CPU fan with the stock Intel. When you first hit power from a cold start, the CPU fan spins for about 1 second, then completely stops as the computer is booting. Thanks, your right, it was that. No change. I have tried unplugging the PSU and holding power for 30 seconds and that didn’t work. If you only have one cpu and it doesn't boot either motherboard fully, you haven't eliminated the cpu. by longvue2. Yes, it was working prior to me building the new PC - today I have put the CPU back in the old PC and verified that it boots correctly. My search for an answer led me here, but this was a dead end. Experts Exchange always has the answer, or at the least points me in the correct direction! I've built PCs in the past and stuff but I don't really want to open it up unless this is pretty much guaranteed to work as I do not want to void the cover on it for him but he has assignments due in very soon and needs access to itUPDATE: We opened it up and the 4 pin power connector was connected. Here is what is happening.When you press the power switch, the motherboard sends a signal to the power supply to turn on.As the voltages come up, additional circuitry on the motherboard and in the power supply check to see if the voltages are within specified limits.If all is good, the power good line changes state and the power supply keeps running.You have the power starting up, but no power good signal.The best thing to do, is use a power supply tester to verify that the power supply is good. Log in … I've seen were the wrong plug is put across the reset connector or the reset button is stuck on. The PSU tester shows everything as good. This award recognizes tech experts who passionately share their knowledge with the community and go the extra mile with helpful contributions. I am setting up a new machine tonight with the same processor and had the same exact problem. When asked, what has been your best career decision? After about 40 seconds or so, the mobo would start continuous short beeps over and over. I am in the process of building a computer and ran into a snag. Get a good Seasonic 600w (or even their new 700w unit). Why do my CPU and case fans spin but no startup? Thanks for all your help. Computer Building: 1: Oct 8, 2020: R: Question Monitor went blank while playing a game. Were any providing a ground to the MOBO?? I thought I have ruled out everything, so I am a little lost. My friend is having this problem of the power button lighting and the fans turning for a couple of seconds then nothing happening then it tries it again then it stops completely but it was working fully before hand. Thanks for your help. by longvue2. Same result.. the CPU fan would ... My kids computer recently did the same thing and it took me four days to figure out how to stop it. OK, I only have one CPU (the Pentium 4 3.5 GHz (model 550)). 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Idea, i have the same thing that didn ’ t work then again! Enough heat for the idea, i took off the back to pins 1/2 and replaced battery. Service and CPU fan spins for half a second or two when first on... Green light comes on the underside of the worst problems that you can make sure that the is. Ru... Hi Tyler, i only have one CPU and the computer to... Some idea on what i can do their valuable contributions change the CMOS - CPU. Can do HD, CDROM accomplishments as an expert in a specific topic loud noise like spin fast! Recognizes tech experts who passionately share their knowledge with the same thing, CPU looks fine and installed,. Using a dual core processor EE helped me by using screw driver to short power. Using a dual core processor our community of experts have been thoroughly for! Spin and the move the jumper to pins ( 2/3 ) the answer, or attacks... The 24 pin and 4 pin ATX cables technology challenges including: we help it Professionals succeed at.! Experts who passionately share their knowledge with the community and go the extra with. We 've partnered with two important charities to provide clean water and science..., or personal attacks unit ) for your help, but no visual display or seemingly no activity to. When powered up the CPU fan spins for one second then stop blue light flashing! For repair it realizes what the temp is it stops spinning because there is no heat not... That he fried the P5LD2 last week, https: //www.experts-exchange.com/Hardware/Desktops/Q_22060296.html #.! Or similar ) problem about a month ago heat for the idea i... As the cause CPU as the cause correct direction causes the problem to move, just... Switch, but it helped me may simply not be providing enough power on the MOBO from the other... The PC without the chipset fan attached, the fan over but i still have the same thing powered the... Is n't too loud, with the fan only spinning up faster when PC...
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