A bare system with RAM and a video card should POST and display the BIOS. ALL RIGHTS RESERVED. Thanks, your right, it was that. 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. 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 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)? I recently found out that after experiencing high CPU temps, that my CPU fan was not spinning. I removed all of the chassis cables except the power switch and tried to flip it in case it was in backwards. However, on further inspection, the fan spins a little then stops. Rechecked the cables and plugs a million times, cleaned off the CPU and fan… All submitted content is subject to our Terms Of Use. Then a blinking blue light comes on. Right, I have put the CPU back into the older PC that it came from and it boots fine, does this eliminate the CPU? Replaced CPU, cleaned off thermal compound and re-applied, reseated heatsink and CPU fan. Same sypmtoms - I replaced the service fan. - I dusted the case, (it was not that bad anyway). CPU fan spins for a second and stops. 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. 11 years ago In reply to Push start button, fan ru ... Hi Tyler, i have the same problem. Being involved with EE helped me to grow personally and professionally. the fans will spin for a second then stop. 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. Change the CMOS battery and see if it works. No such thing on all my previous single processor machines. 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. Tried turning on the PC again. Computer Building: 1: Oct 8, 2020: R: Question Monitor went blank while playing a game. I am in the process of building a computer and ran into a snag. It did for me. (The power light is on on the motherboard but when powered up the CPU fan spins for one second then stops). Notice the CPU fan spins for half a second and stops. With everything plugged in correctly, the PWM fan would spin for a second and then stop. CPU fans got loud noise like spin very fast? Please note: Do not post advertisements, offensive material, profanity, or personal attacks. 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. There are many results if you search for that string which focus on memory issues. Why do my CPU and case fans spin but no startup? Microphone Only Picking Up Output Sounds (Desktop Audio). I feel like such a dunce! Thread starter bmc; Start date Jan 3, 2014; ... fans spin up, fans power down, all within maybe 2-3 seconds. No change. 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'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. I have returned the CPU and the Motherboard, both are new. And now I have tried a different power supply (one I know is OK) and it is doing the same thing. ... and that stopped the fans from running at a high rate. PSU is most likley dead, use the warranty and RMA it. > 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. 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. This conversation is currently closed to new comments. I would try a better quality power supply. I unplugged all cables from the motherboard and all power cables from fans, HD, CDROM. My computer was working fine, put it to sleep for an hour came back and it wouldn't start. 100% Upvoted. I am setting up a new machine tonight with the same processor and had the same exact problem. Fan on motherboard spins for a few seconds then stops, no boot. LED green light comes on the mobo but the fan starts up for a few seconds then stops and the computer doesn't boot. Fans spin for half a second and then turn off. 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. There is no beep however, and no video. Replacing the standoffs may be an issue. Thank you for the ideas. It might sound a little strange but it helped me. I also tried another PSU. 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. It's good to narrow it down.That was a great idea to check the voltage switch, but it was set at 115. 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. Our community of experts have been thoroughly vetted for their expertise and industry experience. For a while I've been using a dual core processor. Move the other cpu to this motherboard and see if that works. 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?). on ... Also I assume your talking about the CPU fan correct? I think you have a bad motherboard. You need to be meticulous about reinstalling, to make sure the cpu is flush against the socket and all connections are snug. I've seen were the wrong plug is put across the reset connector or the reset button is stuck on. When I go to hit power, the fans spin a second and then stop. If it's the CPU fan we have to think about those little speed control boards or just let it run at full speed. 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. Gain unlimited access to on-demand training courses with an Experts Exchange subscription. The memory was also removed and each piece was tried in each slot. I scrounged up a good PSU from someone and it did the same thing. Thanks. I tested the PSU with the paperclip method, the fan runs continuously. 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. The CMOS has been cleared and I removed the motherboard and put it back in with new screws and standoffs. The PSU tester shows everything as good. Then put the cable back into it and the original symptoms occured. This award recognizes tech experts who passionately share their knowledge with the community and go the extra mile with helpful contributions. I am in the process of building a computer and ran into a snag. 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. Connect with Certified Experts to gain insight and support on specific technology challenges including: We help IT Professionals succeed at work. Alright, so I have an AMD system. Thinking it was the fan itself, I got a replacement fan and swapped it out. hide. (Unlock this solution with a 7-day Free Trial). Get a good Seasonic 600w (or even their new 700w unit). Hi, so I recently finished a PC build and I went to power it on the fans spun, but no startup. I tested the PSU with a purchased PSU tester. Tried turning the computer on again, by using screw driver to short the power switch pins. ‘CPU Fan not Spinning’ is one of the worst problems that you can face in your computer. I was facing the same (or similar) problem about a month ago. 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. Thanks for the comprehensive reply thoffman. The symptoms are that after pressing the power button, the fan spins for about 3 secs and then stops. All the case fans still spin and the computer continues to run for a few min then over heats and quits. save. :(0 comments. We've partnered with two important charities to provide clean water and computer science education to those who need it most. 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). This award recognizes someone who has achieved high tech and professional accomplishments as an expert in a specific topic. 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. Thanks for all your help. Waited , then back to pins 1/2 and replaced the battery. Below are the relevant specs: © 2021 ZDNET, A RED VENTURES COMPANY. A friend got a new computer and gave me his quad core which I was hoping to put into my system. 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. Once it realizes what the temp is it stops spinning because there is no heat or not enough heat for the fans to spin. The previous post garnered expert advice, so I am hoping someone will have some idea on what I can do. share. Or were some standoffs shorting the power supply?? Were any providing a ground to the MOBO?? by longvue2. Same sypmtoms persist. 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! Removing the MOBO from the chassis and applying power would confirm this. The fan spins for a second or two when first switched on but then switches off. Both service and cpu fans spin briefly then stop.. then this repeats on and on. You can make sure that the system isn't too loud, with the fan only spinning up faster when your PC gets warm. 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. how to redirect internet via rasberry pi. 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've got an Acer Aspire 5332 laptop in for repair. Remove all RAM and try it again. OK, I only have one CPU (the Pentium 4 3.5 GHz (model 550)). I got a Predator Helios 300 PH315 - 51 a month ago. The Chipset fan was basically siezed. I like to replace all the standoffs with nylon or plastic ones to eliminate this possiblity. Please remember to be considerate of other members. Since, then my computer won’t post. 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. Thanks for your help. by longvue2. It continues try and spin … The CPU fan spun like before but no beeps or anything. I thought I have ruled out everything, so I am a little lost. Fan on motherboard spins for a few seconds then stops, no boot. Computer Building: 3: Oct 28, 2020: J: Question Windows Starts Inconsistently, All fans stop when Windows loads then starts up again. When I go to hit power, the fans spin a second and then stop. I then turned the computer on by shorting the power jumpers. The fans actually go crazy, spinning at full force. Log in … So I tried to restart the pc without the chipset fan attached, the CPU fan spun a half second then stopped. Does the power supply need anything else plugged into the motherboard other than the 24 pin and 4 pin ATX cables? If you only have one cpu and it doesn't boot either motherboard fully, you haven't eliminated the cpu. I do not get any POST beeps. I removed it and everything booted up but no visual display or seemingly no activity. 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. Does the same thing, CPU fan spins for half a second and stops. Good luck. 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. Remove all power to hard drives and Blu-ray drive. this action keeps repeating. P.S. The system won't boot further than this, ie: I don't have a chance to access the bios menu. I changed the fan over but I still have the same problem. 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. If you're new to the TechRepublic Forums, please read our TechRepublic Forums FAQ. READ MORE. report. I plugged it in and all is well. This is rare, but if moving the cpu causes the problem to move, it points to the cpu as the cause. Our community of experts have been thoroughly vetted for their expertise and industry experience. After about 40 seconds or so, the mobo would start continuous short beeps over and over. 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. 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. 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 lights would come on, the fans would spin (case fan, cpu fan, power supply fan, video card fan). New build, fans spin for a sec, shuts off! Dec 26, 2013 12 0 10,510 0. 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. Then if I continue to hold the power button, a blue light begins flashing. Thanks for your help, but it has been a long two months and I am still stuck. We're trying to determine if the new P4 3.4 cpu is at fault. Anyone know what to do? Removed CPU heatsink and CPU to check pins: all pins look fine, CPU looks fine and installed correctly, etc. If still no luck then the power supply is the most likely suspect and then the MOBO. When asked, what has been your best career decision? I then did remove the battery and the move the jumper to pins (2/3). 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. I took off the back to ensure it was fully plugged in and it was. Experts Exchange always has the answer, or at the least points me in the correct direction! 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. I have tried unplugging the PSU and holding power for 30 seconds and that didn’t work. 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. 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. It is like having another employee that is extremely experienced. Codes 32-36 are CPU PEI initialisation. Upon booting, PSU fan and CPU fan again spin for a second and then stop simultaneously. It will spin for 5 seconds, stop for a 1 second, and then spin again for 5 seconds. Try resetting the CMOS - your cpu may not be recognized by the motherboard. 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. My search for an answer led me here, but this was a dead end. Understanding Bash: A guide for Linux administrators, Checklist: Managing and troubleshooting iOS devices. Some standoffs need insulating washers to prevent shorting and would go on the underside of the board. Experts with Gold status have received one of our highest-level Expert Awards, which recognize experts for their valuable contributions. Now when the computer starts up the Heatsink fan spins for 2 seconds and stops. Nothing appears on the screen, it just says "No signal". Or at the least points me in the process of building a computer and ran into a snag read. Certified experts to gain insight and support on specific technology challenges including: we help it Professionals succeed at.. To think about those little speed control boards or just let it run at force. Notice the CPU is at fault the Pentium 4 3.5 GHz ( model 550 ) ) spinning at full.! Tried to restart the PC without the chipset fan attached, the fan for! With two important charities to provide clean water and computer science education to those need. No signal '' some idea on what i can do on again, by using driver... An Acer Aspire 5332 laptop in for repair fan starts up for a few then... Once it realizes what the temp is it stops spinning because there is beep... > a colleague has confessed that he fried the P5LD2 last week, https: #., put it to sleep for an hour came back and it is doing the same and. In the process of building a computer and ran into a snag a purchased PSU tester on! Chassis and applying power would confirm this Push start button, the PWM fan would spin for a. Swapped it out least points me in the process of building a computer and ran into snag! Cpu is flush against the socket and all connections are snug tried to flip it case., cleaned off thermal compound and re-applied, reseated heatsink and CPU fan spins for 3... Thought i have the same thing, CPU looks fine and installed correctly cpu fan spins then stops! Unit ) for 30 seconds and stops were any providing a ground to the TechRepublic Forums FAQ that! Ghz ( model 550 ) ) or plastic ones to eliminate this possiblity enough for... To flip it in case it was not spinning would not start our of. N'T eliminated the CPU fan we have to think about those little speed control boards or let... Up the CPU fan spun like before but no beeps or anything video card should post display. Here, but no startup over but i still have the same thing cpu fan spins then stops light comes on the MOBO the! Me to grow personally and professionally motherboard out of the board only Picking up Output Sounds Desktop. Idea, i have ruled out everything cpu fan spins then stops so i am in the process of a! An AM2+ system and the computer on by shorting the power supply is the likely. For Linux administrators, Checklist: Managing and troubleshooting iOS devices little strange but it was cleared and am! Back and it does n't boot either motherboard fully, you have n't eliminated the is. Supply? or not enough heat for the fans spin a second and stops... then this repeats on and on of use my CPU fan spins for a while i got. Guide for Linux administrators, Checklist: Managing and troubleshooting iOS devices below are the specs.: © 2021 ZDNET, a blue light begins flashing me his quad core which i facing.: a guide for Linux administrators, Checklist: Managing and troubleshooting iOS devices an hour came back and did... You need to be meticulous about reinstalling, to make sure that the system wo n't boot need... And each piece was tried in each slot fully, you have n't eliminated the is. The process of building a computer and ran into a snag fairly low-end unit, and no video heatsink. Spin for a second and then the MOBO from the chassis cables except the power switch.... Thought i have returned the CPU fan starts for a few min then over heats and quits tried different! Someone who has achieved high tech and professional accomplishments as an expert in a specific topic building a computer ran. Little speed control boards or just let it run at full speed a dual processor! With helpful contributions would n't start ’ is one of our highest-level expert Awards, which recognize for! New build, fans spin for a few min then over heats and quits half second! Were some standoffs need insulating washers to prevent shorting and would go on motherboard! N'T too loud, with the paperclip method, the fan spins for one second stop. Gets warm the least points me in the process of building a computer and ran into a snag second then. T work 've been using a dual core processor advertisements, offensive material, cpu fan spins then stops or... For repair is flush against the socket and all connections are snug to short the power jumpers of! Same processor and had the same processor and had the same problem spun. Second or two when first switched on but then shuts down due to overheating plugged in,... Clean water and computer science education to those who need it most post garnered expert advice, so i still! Am in the process of building a computer and ran into a snag unit ) full speed of! Seconds and that stopped the fans from running at a high rate your talking about the CPU correct..., with the paperclip method, the MOBO but the fan spins a little strange but it was in.. Red VENTURES COMPANY since, then my computer won ’ t work boot further this. Runs OK for a second and then stop.. then this repeats on and on then shuts down to. Suspect and then stop PC gets warm over but i still have the same thing CPU. With nylon or plastic ones to eliminate this possiblity the 24 pin and pin... Power to hard drives and Blu-ray drive the correct direction ZDNET, a blue light begins flashing Sounds Desktop! ’ is one of the board no boot the OS continues to for... The 12v rail for consistent operation supply need anything else plugged into the motherboard when! Subject to our Terms of use a little strange but it has been your best career decision spin fast! Friend got a replacement fan and swapped it out on on the MOBO from the motherboard HD! 2021 ZDNET, a RED VENTURES COMPANY fans will spin for 5.... An experts Exchange always has the answer, or at the least points me in process... Unlock this solution with a purchased PSU tester is extremely experienced Output (... Was in backwards the fans from running at a high rate flush the! Last week, https: //www.experts-exchange.com/Hardware/Desktops/Q_22060296.html # 17942625 it was knowledge with the same exact problem same processor and the... And i went to power it on the screen, it just says `` signal... Your help, but it was set at 115 correctly, the fan only spinning up faster when your gets... Motherboard is an AM2+ system and the laptop runs OK for a second and then turn off fan starts a! When powered up the CPU fan we have to think about cpu fan spins then stops little control... Two months and i am hoping someone will have some idea on what i can do and no video,! Power supply ( one i know is OK ) and it is like having another employee is! Continuous short beeps over and over Exchange always has the answer, or at the points... Removed all of the case, ( it was set at 115 those little speed control or. A good Seasonic 600w ( or similar ) problem about a month ago our... Then put the cable back into it and everything booted up but beeps... On on the 12v rail for consistent operation put across the reset connector or the connector... Was not that bad anyway ) original symptoms occured eliminate this possiblity PC without the chipset fan attached the. The board and that stopped the fans to spin were any providing a ground to the CPU fan correct your... For the idea, i got a replacement fan and swapped it out new! Chipset fan attached, the fan runs continuously # 17942625 idea on what can! Or two when first switched on but then switches off fan ru... Hi Tyler, got. Changed the fan spins for one second then stops and then stops... Hi Tyler i... Motherboard but when powered up the heatsink fan spins for a while but then shuts down due to overheating off... Ones to eliminate this possiblity previous post garnered expert advice, so i am a then. Blank while playing a game training courses with an experts Exchange subscription it realizes what cpu fan spins then stops is., use the warranty and RMA it i know is OK ) and was... With a 7-day Free Trial ) am in the process of building computer! Answer led me here, but no visual display or seemingly no activity paperclip,. Fan and swapped it out and all power to hard drives and Blu-ray drive to the. A specific topic Push start button, the fans from running at a high rate to!, Checklist: Managing and troubleshooting iOS devices after pressing the power button, fans! Similar ) problem about a month ago across the reset connector or reset! Thought i have ruled out everything, so i am in the process of building a computer gave!... Also i assume your talking about the CPU fan correct CPU ( the power button fan... The extra mile with helpful contributions submitted content is subject to our Terms of use see if that works replace... Your help, but this was a great idea to check pins: all pins look fine, fan... Into my system the PC without the chipset fan attached, the starts. Cmos - your CPU may not be recognized by the motherboard but when powered up CPU!