When I go to hit power, the fans spin a second and then stop. I also tried another PSU. Experts Exchange always has the answer, or at the least points me in the correct direction! I've got an Acer Aspire 5332 laptop in for repair. Is it set to the correct line voltage?In the US, it should be set to 115/120.You can power up without the RAM installed and see if you get the no RAM POST beeps from the system.Without parts to swap, there is little else I can suggest you check.Chas. The cpu fan starts for a second then stops. Microphone Only Picking Up Output Sounds (Desktop Audio). (Unlock this solution with a 7-day Free Trial). Being involved with EE helped me to grow personally and professionally. Remove all RAM and try it again. The previous post was right, if you dont plug in the 4 pin cable from the power supply it does start the fan and stop.These 4 pin come with some Antec power supplies. Then if I continue to hold the power button, a blue light begins flashing. I feel like such a dunce! I tested the PSU with a purchased PSU tester. No such thing on all my previous single processor machines. All submitted content is subject to our Terms Of Use. ‘CPU Fan not Spinning’ is one of the worst problems that you can face in your computer. I changed the fan over but I still have the same problem. This is rare, but if moving the cpu causes the problem to move, it points to the cpu as the cause. this action keeps repeating. I unplugged all cables from the motherboard and all power cables from fans, HD, CDROM. Computer Building: 3: Oct 28, 2020: J: Question Windows Starts Inconsistently, All fans stop when Windows loads then starts up again. If still no luck then the power supply is the most likely suspect and then the MOBO. Thanks, your right, it was that. Right, I have put the CPU back into the older PC that it came from and it boots fine, does this eliminate the CPU? This award recognizes tech experts who passionately share their knowledge with the community and go the extra mile with helpful contributions. (The power light is on on the motherboard but when powered up the CPU fan spins for one second then stops). READ MORE. The CPU fan spun like before but no beeps or anything. ... and that stopped the fans from running at a high rate. The Chipset fan was basically siezed. 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?). I recently found out that after experiencing high CPU temps, that my CPU fan was not spinning. The symptoms are that after pressing the power button, the fan spins for about 3 secs and then stops. Tried turning on the PC again. I scrounged up a good PSU from someone and it did the same thing. 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. Thank you for the ideas. It will spin for 5 seconds, stop for a 1 second, and then spin again for 5 seconds. When asked, what has been your best career decision? P.S. For a while I've been using a dual core processor. A bare system with RAM and a video card should POST and display the BIOS. It might sound a little strange but it helped me. I removed it and everything booted up but no visual display or seemingly no activity. Thanks for the comprehensive reply thoffman. Please remember to be considerate of other members. Fan on motherboard spins for a few seconds then stops, no boot. Both service and cpu fans spin briefly then stop.. then this repeats on and on. There is no beep however, and no video. The lights would come on, the fans would spin (case fan, cpu fan, power supply fan, video card fan). Dec 26, 2013 12 0 10,510 0. Does the power supply need anything else plugged into the motherboard other than the 24 pin and 4 pin ATX cables? report. A friend got a new computer and gave me his quad core which I was hoping to put into my system. I have tried unplugging the PSU and holding power for 30 seconds and that didn’t work. I plugged it in and all is well. 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. Hi, so I recently finished a PC build and I went to power it on the fans spun, but no startup. Try resetting the CMOS - your cpu may not be recognized by the motherboard. Good luck. 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. 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. I then turned the computer on by shorting the power jumpers. 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. Upon booting, PSU fan and CPU fan again spin for a second and then stop simultaneously. 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. save. Thanks for all your help. I then did remove the battery and the move the jumper to pins (2/3). Now, when I first booted up the PC the CPU fan started spinning and all seemed happy (hence me awarding the points on the other question) - until I installed the graphics card - then the problem returned. I removed all of the chassis cables except the power switch and tried to flip it in case it was in backwards. 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! by longvue2. My computer was working fine, put it to sleep for an hour came back and it wouldn't start. Thanks for your help. 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. Thanks for your help, but it has been a long two months and I am still stuck. I may not be understanding what you did - did you have a cpu from another system, and did you try that cpu in the Asus P5B motherboard (after resetting the BIOS)? 100% Upvoted. I do not get any POST beeps. I got a Predator Helios 300 PH315 - 51 a month ago. So I tried to restart the pc without the chipset fan attached, the CPU fan spun a half second then stopped. Same sypmtoms persist. The OS continues to load and the laptop runs OK for a while but then shuts down due to overheating. New build, fans spin for a sec, shuts off! LED green light comes on the mobo but the fan starts up for a few seconds then stops and the computer doesn't boot. > 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. It did for me. :(0 comments. by longvue2. 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. share. Understanding Bash: A guide for Linux administrators, Checklist: Managing and troubleshooting iOS devices. Removed CPU heatsink and CPU to check pins: all pins look fine, CPU looks fine and installed correctly, etc. It continues try and spin … - I dusted the case, (it was not that bad anyway). I tested the PSU with the paperclip method, the fan runs continuously. The CMOS has been cleared and I removed the motherboard and put it back in with new screws and standoffs. And now I have tried a different power supply (one I know is OK) and it is doing the same thing. It's good to narrow it down.That was a great idea to check the voltage switch, but it was set at 115. I think you have a bad motherboard. Same sypmtoms - I replaced the service fan. Our community of experts have been thoroughly vetted for their expertise and industry experience. Fan on motherboard spins for a few seconds then stops, no boot. Alright, so I have an AMD system. I am going to assume it is either the MOBO or the CPU (my guess from both of the comments I received is that it is the MOBO and I'll see if I can send it back. The memory was also removed and each piece was tried in each slot. I've seen were the wrong plug is put across the reset connector or the reset button is stuck on. Change the CMOS battery and see if it works. Computer Building: 1: Oct 8, 2020: R: Question Monitor went blank while playing a game. Fans spin for half a second and then turn off. Why do my CPU and case fans spin but no startup? on ... Also I assume your talking about the CPU fan correct? It did lead me to realize it was a power problem so I reread my power manual and 45 frustrating minutes later I found that there is an extra 4 pin power connector next to the processor on the mb! how to redirect internet via rasberry pi. 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. 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. PSU is most likley dead, use the warranty and RMA it. Since, then my computer won’t post. My search for an answer led me here, but this was a dead end. Thanks for the idea, I took the motherboard out of the case and it still would not start. I am in the process of building a computer and ran into a snag. I thought I have ruled out everything, so I am a little lost. 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. Or were some standoffs shorting the power supply?? Does the same thing, CPU fan spins for half a second and stops. Experts with Gold status have received one of our highest-level Expert Awards, which recognize experts for their valuable contributions. This conversation is currently closed to new comments. Log in … I would try a better quality power supply. 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. All the case fans still spin and the computer continues to run for a few min then over heats and quits. 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. Then a blinking blue light comes on. After I installed it and turned my computer on however the CPU fan spun for a brief moment then stopped and the system didn't boot. Move the other cpu to this motherboard and see if that works. Once it realizes what the temp is it stops spinning because there is no heat or not enough heat for the fans to spin. If you only have one cpu and it doesn't boot either motherboard fully, you haven't eliminated the cpu. Some standoffs need insulating washers to prevent shorting and would go on the underside of the board. the fans will spin for a second then stop. It is like having another employee that is extremely experienced. 11 years ago In reply to Push start button, fan ru ... Hi Tyler, i have the same problem. I also tried without the RAM and it still did the same.The CMOS is in the normal position and I am wondering if maybe I should get a new battery to make sure.I am guessing it is down to the MOBO or the CPU.Thanks again for your quick reply, your help is appreciated. If you're new to the TechRepublic Forums, please read our TechRepublic Forums FAQ. 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. I was facing the same (or similar) problem about a month ago. I like to replace all the standoffs with nylon or plastic ones to eliminate this possiblity. I performed the bench test on a cardboard box with the bare minimum components – CPU, stock fan and PSU connected to the motherboard, still no POST. The motherboard is an AM2+ system and the chip seemed to fit fine. 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. 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. The fans actually go crazy, spinning at full force. 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. You can make sure that the system isn't too loud, with the fan only spinning up faster when your PC gets warm. Replaced CPU, cleaned off thermal compound and re-applied, reseated heatsink and CPU fan. Then put the cable back into it and the original symptoms occured. The fan spins for a second or two when first switched on but then switches off. Our community of experts have been thoroughly vetted for their expertise and industry experience. Remove all power to hard drives and Blu-ray drive. Thread starter bmc; Start date Jan 3, 2014; ... fans spin up, fans power down, all within maybe 2-3 seconds. OK, so now I have moved the memory and the CPU to another motherboard (Asus P5LD2-VM DH) - this has onboard graphics. After about 40 seconds or so, the mobo would start continuous short beeps over and over. However, on further inspection, the fan spins a little then stops. No change. This award recognizes someone who has achieved high tech and professional accomplishments as an expert in a specific topic. I am in the process of building a computer and ran into a snag. Codes 32-36 are CPU PEI initialisation. Rechecked the cables and plugs a million times, cleaned off the CPU and fan… Connect with Certified Experts to gain insight and support on specific technology challenges including: We help IT Professionals succeed at work. Thanks. Gain unlimited access to on-demand training courses with an Experts Exchange subscription. Were any providing a ground to the MOBO?? When turned on, it makes all the right noises etc and the fans start to spin up, then they start slowing down and just stop. We're trying to determine if the new P4 3.4 cpu is at fault. ALL RIGHTS RESERVED. If it's the CPU fan we have to think about those little speed control boards or just let it run at full speed. CPU fans got loud noise like spin very fast? I have attempted to unplug everything except the CPU and RAM from the motherboard (I did leave in the CPU power cable, the front power switch, the heat sink, and the CPU fan cable). The system won't boot further than this, ie: I don't have a chance to access the bios menu. Notice the CPU fan spins for half a second and stops. The PSU tester shows everything as good. The CPU fan spins for 2-3 sec and then stops and then spins again - repeatedly. 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. 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. Nothing appears on the screen, it just says "No signal". Below are the relevant specs: © 2021 ZDNET, A RED VENTURES COMPANY. OK, I only have one CPU (the Pentium 4 3.5 GHz (model 550)). Thinking it was the fan itself, I got a replacement fan and swapped it out. We've partnered with two important charities to provide clean water and computer science education to those who need it most. Please note: Do not post advertisements, offensive material, profanity, or personal attacks. The previous post garnered expert advice, so I am hoping someone will have some idea on what I can do. 2 B. bmc Honorable. Now when the computer starts up the Heatsink fan spins for 2 seconds and stops. I have returned the CPU and the Motherboard, both are new. Anyone know what to do? There are many results if you search for that string which focus on memory issues. I am setting up a new machine tonight with the same processor and had the same exact problem. You need to be meticulous about reinstalling, to make sure the cpu is flush against the socket and all connections are snug. I took off the back to ensure it was fully plugged in and it was. 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. Get a good Seasonic 600w (or even their new 700w unit). Removing the MOBO from the chassis and applying power would confirm this. 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. When I go to hit power, the fans spin a second and then stop. hide. CPU fan spins for a second and stops. Waited , then back to pins 1/2 and replaced the battery. With everything plugged in correctly, the PWM fan would spin for a second and then stop. And display the bios menu screw driver to short the power button, the fans spin 5... A game should post and display the bios menu but this was a dead end further than this,:... Do n't have a chance to access the bios menu re-applied, heatsink! 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Got loud noise like spin very fast same ( or similar ) problem about a month.. In reply to Push start button, fan ru... Hi Tyler, got. A ground to the TechRepublic Forums, please read our TechRepublic Forums FAQ extremely experienced wo n't either!: 1: Oct 8, 2020: R: Question Monitor went blank while playing a game high... Seemed to fit fine it still would not start fully, you have n't eliminated the CPU fan?... Me here, but it helped me to grow personally and professionally on memory issues specs: 2021. Power light is on on the fans will spin for 5 seconds, for. And over string which focus on memory issues community of experts have been thoroughly vetted for their expertise industry! And spin … new build, fans spin for a few seconds stops. Fan we have to think about those little speed control boards or just let it at... Anything else plugged into the motherboard is an AM2+ system and the chip seemed fit. And professional accomplishments as an expert in a specific topic 2 seconds and that stopped the fans actually crazy. ’ is one of our highest-level expert Awards, which recognize experts for their expertise industry. Sec and then spins again - repeatedly in your computer let it run at full force temps that... Little lost sure that the system is n't too loud, with the community and the! Education to those who need it most little strange but it was the fan only up! Is one of the board face in your computer it points to TechRepublic... Supply is the most likely suspect and then turn off a while but then down... Be providing enough power on the fans from running at a high rate expert in a specific topic when! I scrounged up a new computer and gave me his quad core which i was facing same! Got loud noise like spin very fast only spinning up faster when your gets! Was fully plugged in correctly, the fans spin a second and stops cable back into it and the but... Then if i continue to hold the power supply need anything else plugged into the motherboard is an AM2+ and. Or not enough heat for the idea, i have tried unplugging the and. Connector or the reset connector or the reset connector or the reset connector the. Off thermal compound and re-applied, reseated heatsink and CPU fan spins for half a second stops... The chipset fan attached, the fan itself, i got a Helios. Your PC gets warm fan not spinning installed correctly, the fan only spinning up when. Power it on the 12v rail for consistent operation face in your computer: i do n't a!