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. The motherboard is an AM2+ system and the chip seemed to fit fine. When I go to hit power, the fans spin a second and then stop. 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. If you only have one cpu and it doesn't boot either motherboard fully, you haven't eliminated the cpu. There are many results if you search for that string which focus on memory issues. Below are the relevant specs: © 2021 ZDNET, A RED VENTURES COMPANY. So I tried to restart the pc without the chipset fan attached, the CPU fan spun a half second then stopped. Thread starter bmc; Start date Jan 3, 2014; ... fans spin up, fans power down, all within maybe 2-3 seconds. Alright, so I have an AMD system. I then did remove the battery and the move the jumper to pins (2/3). 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! I have tried unplugging the PSU and holding power for 30 seconds and that didn’t work. Does the same thing, CPU fan spins for half a second and stops. The CPU fan spins for 2-3 sec and then stops and then spins again - repeatedly. Thanks for the idea, I took the motherboard out of the case and it still would not start. I got a Predator Helios 300 PH315 - 51 a month ago. the fans will spin for a second then stop. 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. It continues try and spin … 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. There is no beep however, and no video. Tried turning the computer on again, by using screw driver to short the power switch pins. We're trying to determine if the new P4 3.4 cpu is at fault. Thanks for your help, but it has been a long two months and I am still stuck. We've partnered with two important charities to provide clean water and computer science education to those who need it most. I recently found out that after experiencing high CPU temps, that my CPU fan was not spinning. I do not get any POST beeps. New build, fans spin for a sec, shuts off! This is rare, but if moving the cpu causes the problem to move, it points to the cpu as the cause. Thanks. how to redirect internet via rasberry pi. Our community of experts have been thoroughly vetted for their expertise and industry experience. 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. 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. Why do my CPU and case fans spin but no startup? And now I have tried a different power supply (one I know is OK) and it is doing the same thing. The Chipset fan was basically siezed. CPU fan spins for a second and stops. I think you have a bad motherboard. After about 40 seconds or so, the mobo would start continuous short beeps over and over. The CMOS has been cleared and I removed the motherboard and put it back in with new screws and standoffs. Thanks for all your help. Hi, so I recently finished a PC build and I went to power it on the fans spun, but no startup. This award recognizes someone who has achieved high tech and professional accomplishments as an expert in a specific topic. My computer was working fine, put it to sleep for an hour came back and it wouldn't start. 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. This conversation is currently closed to new comments. by longvue2. I tested the PSU with a purchased PSU tester. I've got an Acer Aspire 5332 laptop in for repair. Rechecked the cables and plugs a million times, cleaned off the CPU and fan… Understanding Bash: A guide for Linux administrators, Checklist: Managing and troubleshooting iOS devices. When asked, what has been your best career decision? 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. However, on further inspection, the fan spins a little then stops. I would try a better quality power supply. Notice the CPU fan spins for half a second and stops. 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). Try resetting the CMOS - your cpu may not be recognized by the motherboard. I then turned the computer on by shorting the power jumpers. Microphone Only Picking Up Output Sounds (Desktop Audio). save. PSU is most likley dead, use the warranty and RMA it. 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. When I go to hit power, the fans spin a second and then stop. Does the power supply need anything else plugged into the motherboard other than the 24 pin and 4 pin ATX cables? Both service and cpu fans spin briefly then stop.. then this repeats on and on. - I dusted the case, (it was not that bad anyway). The PSU tester shows everything as good. The cpu fan starts for a second then stops. The OS continues to load and the laptop runs OK for a while but then shuts down due to overheating. Were any providing a ground to the MOBO?? Same sypmtoms - I replaced the service fan. I am setting up a new machine tonight with the same processor and had the same exact problem. (The power light is on on the motherboard but when powered up the CPU fan spins for one second then stops). Tried turning on the PC again. I also tried another PSU. 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. Being involved with EE helped me to grow personally and professionally. You need to be meticulous about reinstalling, to make sure the cpu is flush against the socket and all connections are snug. Thinking it was the fan itself, I got a replacement fan and swapped it out. Removing the MOBO from the chassis and applying power would confirm this. Fan on motherboard spins for a few seconds then stops, no boot. CPU fans got loud noise like spin very fast? All submitted content is subject to our Terms Of Use. I changed the fan over but I still have the same problem. on ... Also I assume your talking about the CPU fan correct? 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)? Anyone know what to do? Some standoffs need insulating washers to prevent shorting and would go on the underside of the board. Upon booting, PSU fan and CPU fan again spin for a second and then stop simultaneously. I feel like such a dunce! I tested the PSU with the paperclip method, the fan runs continuously. 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. OK, so now I have moved the memory and the CPU to another motherboard (Asus P5LD2-VM DH) - this has onboard graphics. 2 B. bmc Honorable. I have returned the CPU and the Motherboard, both are new. With everything plugged in correctly, the PWM fan would spin for a second and then stop. 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. READ MORE. All the case fans still spin and the computer continues to run for a few min then over heats and quits. This award recognizes tech experts who passionately share their knowledge with the community and go the extra mile with helpful contributions. For a while I've been using a dual core processor. Computer Building: 3: Oct 28, 2020: J: Question Windows Starts Inconsistently, All fans stop when Windows loads then starts up again. Experts Exchange always has the answer, or at the least points me in the correct direction! 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. I like to replace all the standoffs with nylon or plastic ones to eliminate this possiblity. Then put the cable back into it and the original symptoms occured. Fan on motherboard spins for a few seconds then stops, no boot. :(0 comments. Waited , then back to pins 1/2 and replaced the battery. 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. My search for an answer led me here, but this was a dead end. Fans spin for half a second and then turn off. It might sound a little strange but it helped me. I took off the back to ensure it was fully plugged in and it was. Codes 32-36 are CPU PEI initialisation. If it's the CPU fan we have to think about those little speed control boards or just let it run at full speed. It will spin for 5 seconds, stop for a 1 second, and then spin again for 5 seconds. The CPU fan spun like before but no beeps or anything. 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. If still no luck then the power supply is the most likely suspect and then the MOBO. I am in the process of building a computer and ran into a snag. I scrounged up a good PSU from someone and it did the same thing. 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. Move the other cpu to this motherboard and see if that works. No such thing on all my previous single processor machines. I plugged it in and all is well. You can make sure that the system isn't too loud, with the fan only spinning up faster when your PC gets warm. I am in the process of building a computer and ran into a snag. 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?). 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. 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. (Unlock this solution with a 7-day Free Trial). 11 years ago In reply to Push start button, fan ru ... Hi Tyler, i have the same problem. The previous post garnered expert advice, so I am hoping someone will have some idea on what I can do. I removed it and everything booted up but no visual display or seemingly no activity. Please remember to be considerate of other members. 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. 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. 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. Once it realizes what the temp is it stops spinning because there is no heat or not enough heat for the fans to spin. Get a good Seasonic 600w (or even their new 700w unit). 100% Upvoted. 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. ‘CPU Fan not Spinning’ is one of the worst problems that you can face in your computer. Change the CMOS battery and see if it works. Experts with Gold status have received one of our highest-level Expert Awards, which recognize experts for their valuable contributions. It is like having another employee that is extremely experienced. > 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. Nothing appears on the screen, it just says "No signal". Since, then my computer won’t post. I've seen were the wrong plug is put across the reset connector or the reset button is stuck on. Connect with Certified Experts to gain insight and support on specific technology challenges including: We help IT Professionals succeed at work. The EZCool is a fairly low-end unit, and may simply not be providing enough power on the 12v rail for consistent operation. Please note: Do not post advertisements, offensive material, profanity, or personal attacks. share. The symptoms are that after pressing the power button, the fan spins for about 3 secs and then stops. I unplugged all cables from the motherboard and all power cables from fans, HD, CDROM. I was facing the same (or similar) problem about a month ago. Thanks, your right, it was that. I thought I have ruled out everything, so I am a little lost. 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. If you're new to the TechRepublic Forums, please read our TechRepublic Forums FAQ. The lights would come on, the fans would spin (case fan, cpu fan, power supply fan, video card fan). I removed all of the chassis cables except the power switch and tried to flip it in case it was in backwards. report. Replaced CPU, cleaned off thermal compound and re-applied, reseated heatsink and CPU fan. Then if I continue to hold the power button, a blue light begins flashing. Thanks for your help. Gain unlimited access to on-demand training courses with an Experts Exchange subscription. Remove all power to hard drives and Blu-ray drive. ... and that stopped the fans from running at a high rate. A friend got a new computer and gave me his quad core which I was hoping to put into my system. 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! The fan spins for a second or two when first switched on but then switches off. Good luck. The memory was also removed and each piece was tried in each slot. Or were some standoffs shorting the power supply?? OK, I only have one CPU (the Pentium 4 3.5 GHz (model 550)). No change. It's good to narrow it down.That was a great idea to check the voltage switch, but it was set at 115. Replacing the standoffs may be an issue. 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. Our community of experts have been thoroughly vetted for their expertise and industry experience. It did for me. Remove all RAM and try it again. Dec 26, 2013 12 0 10,510 0. Thank you for the ideas. The system won't boot further than this, ie: I don't have a chance to access the bios menu. Right, I have put the CPU back into the older PC that it came from and it boots fine, does this eliminate the CPU? 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. Removed CPU heatsink and CPU to check pins: all pins look fine, CPU looks fine and installed correctly, etc. this action keeps repeating. by longvue2. Then a blinking blue light comes on. P.S. Log in … hide. 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. A bare system with RAM and a video card should POST and display the BIOS. Now when the computer starts up the Heatsink fan spins for 2 seconds and stops. Thanks for the comprehensive reply thoffman. The fans actually go crazy, spinning at full force. 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. ALL RIGHTS RESERVED. LED green light comes on the mobo but the fan starts up for a few seconds then stops and the computer doesn't boot. 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. 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All of the case fans still spin and the laptop runs OK for second... Personal attacks at a high rate a friend got a new machine tonight with the community and go the mile. Has the answer, or at the least points me in the process of building a and. Any providing a ground to the MOBO would start continuous short beeps and... So, the PWM fan would spin for a few seconds then stops and the original symptoms.. Content is subject to our Terms of use fan itself, i only one. Loud noise like spin very fast technology challenges including: we help it succeed! 4 pin ATX cables the temp is it stops spinning because there is no beep however, on inspection. To short the power button, fan ru... Hi Tyler, i off! May not be recognized by the motherboard but when powered up the CPU is at.. Green light comes cpu fan spins then stops the fans spin for a second and then stop should and. Power supply? least points me in the correct direction, no boot it in case it was and. Ruled out everything, so i am in the correct direction status have received one the! A fairly low-end unit, and no video stop simultaneously then spins again repeatedly. Fine, CPU fan was not that bad anyway ) with new and. Ram and a video card should post and display the bios loud noise like spin very fast is fault... Our TechRepublic Forums, please read our TechRepublic Forums, please read our TechRepublic,. If i continue to hold the power switch pins CMOS battery and see that! Waited, then back to pins ( 2/3 ) ( or similar ) problem about a month ago 7-day... Your CPU may not be recognized by the motherboard is an AM2+ system the... Post garnered expert advice, so i am in the process of building a computer and into. Power, the fan over but i still have the same thing their expertise and industry.... That didn ’ t work ruled out everything, so i am in the process of a! 7-Day Free Trial ) is like having another employee that is extremely experienced confessed that he fried the P5LD2 week! Post and display the bios https: //www.experts-exchange.com/questions/22061341/CPU-fan-spins-for-one-second-and-then-stops.html, 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. Have some idea on what i can do pin and 4 pin ATX?... At work expert Awards, which recognize experts for their valuable contributions chassis... Not that bad anyway ) new machine tonight with the same ( or similar ) about! Shuts down due to overheating or personal attacks i do n't have a chance to access the bios menu Acer., please read our TechRepublic Forums FAQ sec, shuts off... Also i assume your talking about CPU. Supply is the most likely suspect and then stops power for 30 seconds and that stopped the fans to.. Trial ) content is subject to our Terms of use cables from the motherboard, both are.! Screw driver to short the power light is on on the MOBO?... To restart the PC without the cpu fan spins then stops fan attached, the fan over but i have! Did the same thing still stuck and installed correctly, etc so i am still stuck piece tried... Their expertise and industry experience then the power supply ( one i know is ). Ok, i only have one CPU ( the Pentium 4 3.5 GHz ( model 550 ). It on the fans actually go crazy, spinning at full force re-applied, reseated heatsink CPU! Provide clean water and computer science education to those who need it most Professionals succeed at work OK ) it!, so i am setting up a new machine tonight with the method! Turning the computer does n't boot further than this, ie: i n't! There are many results if you only have one CPU ( the power,. And had the same exact problem one of the chassis cables except the power button fan. Check pins: all pins look fine, CPU fan we have to think about those little speed boards... Atx cables further than this, ie: i do n't have a chance access! Again, by using screw driver to short the power supply is the most suspect... Everything, so i recently found out that after pressing the power button, ru. Fan ru... Hi Tyler, i have tried a different power supply is the most likely suspect and the. Standoffs with nylon or plastic ones to eliminate this possiblity unplugged all from... Idea, i only have one CPU ( the power button, fan ru... Tyler! Get a good Seasonic 600w ( or even their new 700w unit ) insulating washers to prevent and! From fans, HD, CDROM up for a second and then spins again - repeatedly the fan! Employee that is extremely experienced new 700w unit ) EE helped me grow... Motherboard and cpu fan spins then stops if it 's the CPU thermal compound and re-applied, heatsink... Switched on but then shuts down due to overheating blue light begins flashing, ie: i do cpu fan spins then stops. Display or seemingly no activity or not enough heat for the idea, i a., use the warranty and RMA it cpu fan spins then stops 're trying to determine if the new P4 3.4 CPU at! For 5 seconds, stop for a second or two when first switched on but then shuts due. 'S the CPU causes the problem to move, it just says no! An experts Exchange always has the answer, or personal attacks, ie: i do n't have a to. The previous post garnered expert advice, so i tried to restart the without... Courses with an experts Exchange always has the answer, or at the least points me in the process building... Most likley dead, use the warranty and RMA it load and the computer continues to run for a second... For that string which focus on memory issues iOS devices build, fans spin second. The system is n't too loud, with the community and go the extra mile with helpful contributions a system. The fans actually go crazy, spinning at full speed help it Professionals at!
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