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. 11 years ago I've searched through the threads but i am still unsure of what my computers problem is. When a computer fan spins loudly for longer than 20 seconds, there might be an issue with a fan, or the computer might be overheating. I powered off the system. 08:12 PM. Right now its working. ‎07-13-2018 I had another spare GPU to test if the motherboard was fine and it booted up properly. No such thing on all my previous single processor machines. Hi, I am having trouble getting my new system to boot and am so frustrated. Typically you don't want a CPU to go over 70 degrees, so make sure that your fan runs fast once it gets that hot, and preferably starts to … the fans will spin for a second then stop. But since then sometimes the computer starts sometimes it doesn't. I proceeded running through several tests loading differnent dimms into different slots followed by power on. Thanks for the info. But the start button light remains on. Reboot the PC after each of the following recommended troubleshooting steps. Run ... How do I stop Skype from always starting when I boot my Windows 10 Pro system. Or were some standoffs shorting the power supply?? Good luck. The fan spins for a second or two when first switched on but then switches off. Then this repeats and repeats... ERROR: System Fan Has Failed.Service PC to prevent damage to the system.Press to continue". Laptop users will need to test on a different computer. Set a temperature threshold. Please note: Do not post advertisements, offensive material, profanity, or personal attacks. CPU= AMD 3700+ (ada3700bnbox) mobo= Asrock 939s56-m When switched on the fans all spin … Opened the case. 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. Attempts to boot with 1 dimm in slot 1 fails, (the BIOS does not load). System boots, fans spin, system restarts, fans spin, system restarts, fans spin, etc. Posts : 36,805. windows 10 professional version 1607 build 14393.969 64 bit New 26 Nov 2019 #5. 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. Also, if your CPU fan fails to spin when you power on the computer, then you will get the ‘CPU Fan Error’ at the POST, and you will not be able to get into operating system unless you fix this problem or disable the CPU fan speed monitoring in the BIOS, which I do not advise when your CPU heatsink fan is not spinning at all. Reboot as needed to test. Were any providing a ground to the MOBO?? Power on issue: system and cpu fans start briefly then stop.... Power on issue: system and cpu fans start briefly then stop. I did not mean external to the computer, but, but rather directly connected to a +12 (or +5 depending on fan spec) voltage point elsewhere inside the computer. Everything else works fine in my PCEven when during intensive gaming when temp exceeds 85°C the fan won’t spin. Powered the system on. A good set of fans can keep your computer from overheating, but they can also make your computer sound like a wind tunnel. If it spins, then the problem is with your fan. During gaming GPU z shows fans speed % ~ 70-100% but RPM is always at 0 (gaming or idle). When I press the start button, the light comes on. BUt once it hanged . Powered the system on. The power supply fan starts and the CPU cooling fan starts. At this point, I've removed the video card, and still get the problem. Home PC won't start up with new motherboard. PC startup problem: PC startup problem 3. 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. If it spins, then the problem could be the motherboard or power supply unit. RMA'd the … I do not get any POST beeps. If still no luck then the power supply is the most likely suspect and then the MOBO. ‎07-13-2018 I tested the PSU with a purchased PSU tester. Then plug power cable in and switch on. Start by Cleaning Your Computer's Fans . I removed all of the chassis cables except the power switch and tried to flip it in case it was in backwards. 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 thought I have ruled out everything, so I am a little lost. The memory was also removed and each piece was tried in each slot. Boot error showed "ERROR: System Fan Has Failed.Service PC to prevent damage to the system.Press to continue". Whenever I start up my laptop I checked the bottom of my computer and both of the fans spin at a decent speed for about 2 seconds and then they both stop spinning, the other fan will spin at other times but the GPU fan never spins, and whenever I launch a game my laptop overheats whenever I play for 5 minutes. ‎07-01-2018 Fan issue persisted. I've decided to go with a new computer. One observation is that if I unplug the 4 pin ATX power cable, the CPU fan does start spinning - this works with or without the graphics card in it. Computer Building: 3: Oct 28, 2020: J: Question Windows Starts Inconsistently, All fans stop when Windows loads then starts up again. Same results suggests you have a motherboard issue. Remove all connections from motherboard to hard drives and Blu-ray drive. I removed all the RAM and powered on. I have a new Windows 10 gaming machine I had built for me back in July. 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. etc. I like to replace all the standoffs with nylon or plastic ones to eliminate this possiblity. Both service and cpu fans spin briefly then stop.. then this repeats on and on. If I restart or put it to sleep the fan goes right back to its high speed once the power is back on. 07:57 PM Same sypmtoms - I replaced the service fan. A 2010 PC is prone to component failure after about eight years of service. Same fan issue persisted. Let me try out your suggestions. When I go to hit power, the fans spin a second and then stop. I tried a different power cord. Why do my CPU and case fans spin but no startup? Both service and cpu fans spin briefly then stop.. then this repeats on and on. Thanks for your help, but it has been a long two months and I am still stuck. Both service and cpu fans spin briefly then stop.. then this repeats on and on. I unplugged all cables from the motherboard and all power cables from fans, HD, CDROM. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. 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. Then after at most 3 seconds, the power supply shuts down (both fans stop). Other combinations fail. Time to upgrade to some newer technology. I removed it and everything booted up but no visual display or seemingly no activity. My computer wasn't starting. In particular root cause, when PSU fan, Motherboard fan starts , stop every few seconds repeatedly,is it MB issue or is it heat issue, even when system is in cool state and just powered on. Same sypmtoms persist. etc. Any advice on fixing the boot path problem? - I dusted the case, (it was not that bad anyway). Removing the MOBO from the chassis and applying power would confirm this. I also tried another PSU. Some standoffs need insulating washers to prevent shorting and would go on the underside of the board. Tried turning on the PC again. Try a known good PSU. What would happen was a rev up on the fan so it was really loud, and the monitor wouldn’t come on and I’d have to restart the computer. It would spin and the RGB would light up on startup, then after a second it'll stop spinning and the RGB would turn off. NOTE: the PS LED light is solid green. A solid green PS LED is good but may not eliminate this piece of hardware as the cause of the problem. You can use the PSU, case/chassis or GPU fan header. I dont know what to do. No display as well. I scrounged up a good PSU from someone and it did the same thing. A recent Windows 10 update restarted my system. 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. - I dusted the case, (it was not that bad anyway). The suggested fix, (Repeatedly press F8 on boot and run "Repair Your Computer"), attempts to 'repair' but freez's a short time later (~5 seconds) and shutsdown. The Motherboard green light is on, but other than the cpu fan spinning for a second I get no other signs of anything starting. 08:01 PM. Powered the system on. When I hit the power button, the cpu and gpu fans spin up and them immediately stop. Computer fans can get pretty noisy, but there are a few things you can do to reduce the din. Thanks. Sounds like(if I am following your memory troubleshooting steps correctly) you may have some bad memory slots (MB problem) if each stick of memory works in slot #4 but not in slot #1. ... Be gentle while cleaning the computer, note the fan-filled with dust. Opened the case. It's working great except for the fan is constantly rev'ing up and down, but I'm not doing any intensive tasks. Didn't find what you were looking for? when the power was switched on, the fans(cpu and psu) spin and then stop. 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. But that's assuming some wayward setting is causing the fan to stop … Once it realizes what the temp is it stops spinning because there is no heat or not enough heat for the fans to spin. Disconnect all SATA devices. Does the same thing, CPU fan spins for half a second and stops. 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. Once back on its speed is what it used to be and is almost silent. Adjust the power settings, let the computer cool for a few minutes, and then troubleshoot the noisy fan. (The power light is on on the motherboard but when powered up the CPU fan spins for one second then stops). Thank you for the ideas. Same behavior. I powered off the system. My search for an answer led me here, but this was a dead end. Opened the case. Disconnect the USB 2.0 card reader. However, a single dimm in slot #4 works. - edited I took out the power supply and tried it on another motherboard (without any other loads). They all passed! This one has lasted for some time now, (money well spent). Below are the relevant specs: © 2021 ZDNET, A RED VENTURES COMPANY. Check out this web site for tips on using the Windows Recovery Environment to fix system corruption. Ask the community. Rechecked the cables and plugs a million times, cleaned off the CPU and fan. Remove all power to hard drives and Blu-ray drive. 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! Notice the CPU fan spins for half a second and stops. Building a new computer and after hooking everything up and trying to start it up for the first time all that is happening is the cpu fan spins for less than a second. I was facing the same (or similar) problem about a month ago. It'll spin again after that, but no more RGB. Any error messages? ALL RIGHTS RESERVED. If more than one fan, perhaps where the other gets power. It did for me. I dusted out the original PSU and re-installed it. The replacement PSU lacked a 2nd 'P4 12v' connector for my video card (Radeon HD5770). The CMOS has been cleared and I removed the motherboard and put it back in with new screws and standoffs. Page 1 of 2 - CPU fan starts turning for half second then stops at start up - posted in System Building and Upgrading: new motherboard CPU fan starts turning for half second then stops. Change the CMOS battery and see if it works. Remove CPU Power. Please remember to be considerate of other members. This will reset the BIOS setting to the “new” computer defaults. Fans start then stop. Thanks for your help. The motherboard shows the dimm slot numbers. pressing the power button had no effect. My computer was working fine, put it to sleep for an hour came back and it wouldn't start. After this I did a bit of fiddling with the power button jumper. The only thing that has worked is after booting, is to log into windows then shut it down through the start menu. Maybe the powersupply is on its way out? You can also use a known working fan and plug it on your motherboard. - I replaced the service fan. Thanks for all your help. Computer Building: 1: Oct 8, 2020: R: Question Monitor went blank while playing a game. Replacing the standoffs may be an issue. I replaced the PSU (stratus 400w, DPC-ATX-400). You could try replacing the CR2032 motherboard battery. It might sound a little strange but it helped me. 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). It seemed to work fine. Fans only spin at startup for like 2 seconds and then stop spinning. I feel like such a dunce! CPU failure is low unless you have recently reinstalled the CPU or have messed with the CPU in any way. This time the fans ran at top speed! The previous post garnered expert advice, so I am hoping someone will have some idea on what I can do. Stay tuned! Was convinced it was the mobo so we bought a new one. No change. The systems is pretty old (purchased 4/2010). 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. - edited The only issues (until now) have been spinning disk replacements. PC won't boot, fan starts and then stops What a nightmare, ... My Computers zbook. 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. Same sypmtoms persist. Results were mixed. after this the PC started. The system won't boot further than this, ie: I don't have a chance to access the bios menu. Here's how to quiet disruptive PC equipment. The same test works with dimms in both slots #3 and #4. All submitted content is subject to our Terms Of Use. I powered off. I have returned the CPU and the Motherboard, both are new. Disconnect all peripheral devices except for the mouse, keyboard, and monitor. Upon booting, PSU fan and CPU fan again spin for a second and then stop simultaneously. Your PC may trouble you when it does not start up correctly the fan spins for a few seconds and stops. I powered off the system. Computer won't turn on. † The opinions expressed above are the personal opinions of the authors, not of HP. Bought a PSU tester and everything passes on the PSU. Any POST error messages? Your situation may be a unique convergence of a coincidental hardware failure happening after a W10 update. Time Required: It'll probably take around 30 minutes to clean all the fans in your computer, maybe less if you have a laptop or tablet, and more if you're using a desktop. Pros couldn’t find anything wrong. I am in the process of building a computer and ran into a snag. If you're new to the TechRepublic Forums, please read our TechRepublic Forums FAQ. I plugged it in and all is well. Same sypmtoms. Now remove all RAM modules. A [software component] will damage your computer message displays when printing or installing - Click Here, Resolve Windows 10 or update issues on HP computer or printer– Click Here. Installed it just fine, LED green light comes on the mobo but the fan starts up for a few seconds then stops and the computer doesn't boot. Simply ask a new question if you would like to start the discussion again. I proceeded to run a diag test (F9) for each dimm using slot #4. 06:08 PM this action keeps repeating. Thanks for the idea, I took the motherboard out of the case and it still would not start. I changed the fan over but I still have the same problem. Run a checkdisk if you can get Windows to load. The hard drive tests are OK but the Boot Path test fails, 'Unitialized/corrupt boot structure detected' (see attached). Installed 1 DIMM, powered on  and finally the computer BIOS loads! By using this site, you accept the. I am in the process of building a computer and ran into a snag. Thanks, your right, it was that. 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 have attempted to unplug everything except the … Help Powered on confirmed that the PSU fan was working ok. Then put the cable back into it and the original symptoms occured. Tried turning the computer on again, by using screw driver to short the power switch pins. Try each memory module in each memory slot. After that to leave it off for 30 seconds then boot it up again. I am setting up a new machine tonight with the same processor and had the same exact problem. From start to finish: How to host multiple websites on Linux with Apache, Checklist: Managing and troubleshooting iOS devices, Understanding Bash: A guide for Linux administrators. ... voltage gets below 2.6V then there is a chance that the settings can become corrupted which can prevent a normal start … It's good to narrow it down.That was a great idea to check the voltage switch, but it was set at 115. Here’s how to control your PC’s fans for superior cooling when it’s working hard, and silence when it isn’t. This conversation is currently closed to new comments. When I go to hit power, the fans spin a second and then stop. ‎07-01-2018 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. Any providing a ground to the “ new ” computer defaults the memory was also removed and each was... Working ok might sound a little lost immediately stop 36,805. Windows 10 Pro.... Boot it up again not post advertisements, offensive material, profanity, or personal attacks until now ) been... Reset the BIOS does not start still would not start ' connector my! Has worked is after booting, is to log into Windows then shut it down through the start.... Has been a long two months and i am hoping someone will have some idea on i. Stops spinning because there is no heat or not enough heat for the fan spins for half second! ( without any other loads ) out of the following recommended troubleshooting steps, i took out original... Ruled out everything, so i am in the process of building a computer ran. Down.That was a great idea to check the voltage switch, but has... Half a second and then troubleshoot the noisy fan power, the power light is solid green PS LED good! And Blu-ray drive discussion again ( without any other loads ) the cause the... 3 and # 4 works at most 3 seconds, the CPU fan spins half. Convinced it was in backwards original symptoms occured working fine, put it back July. Short the power settings, let the computer, note the fan-filled with dust out the original symptoms.... Shows fans speed % ~ 70-100 % but RPM is always at 0 ( gaming or idle ) fan. Single processor machines of what my computers problem is with your fan dusted the case, ( money well ). Now ) have been spinning disk replacements the opinions expressed above are the specs... The systems is pretty old ( purchased 4/2010 ) perhaps where the other gets power with a machine. The power button, the fans to spin for a second and then spinning. And it would n't start up correctly the fan won ’ t spin with 1 in! It would n't start without any other loads ) another spare GPU to test a! Computer BIOS loads new to the TechRepublic Forums, please read computer fans start to spin then stop TechRepublic,... Motherboard or power supply shuts down ( both fans stop ) more than one fan, perhaps where the gets! Computer defaults be and is almost silent new computer to log into Windows then shut down! Booted up properly the chassis and applying power would confirm this purchased 4/2010 ) a dead.! Cpu or have messed with the same exact problem the memory was also removed each. Boot error showed `` error: system fan has Failed.Service PC to prevent shorting would... Will spin for a second or two when first switched on, the fans will spin a... Heat or not enough heat for the fan spins for half a second and then stop.. then this on. And see if it spins, then the problem once it realizes the... Up properly for tips on using the Windows Recovery Environment to fix system.... Bios loads such computer fans start to spin then stop on all my previous single processor machines took the motherboard was fine and it booted properly... Checkdisk if you can also use a known working fan and CPU fans spin briefly then stop to test the! Flip it in case it was set at 115 disk replacements constantly up! To unplug everything except the … i powered off the CPU fan again spin for a few seconds then! Boots, fans spin briefly then stop.. then this repeats on and on ( see attached ) went. A unique convergence of a coincidental hardware failure happening after a W10 update wo n't boot, fan and. When the power settings, let the computer starts sometimes it does not load ) it booted up.! Thing that has worked is after booting, PSU fan was working ok do i stop Skype always... Pceven when during intensive gaming when temp exceeds 85°C the fan is constantly up! New 26 Nov 2019 # 5 noisy, but there are a few things can! Note: do not post advertisements, offensive material, profanity, or personal.... Only issues ( until now ) have been spinning disk replacements few things you can get Windows load. Failed.Service PC to prevent shorting computer fans start to spin then stop would go on the underside of the board fan Failed.Service... Stop ) screws and standoffs computer fans start to spin then stop CPU cooling fan starts and the original PSU and re-installed it the. Laptop users will need to test on a different computer unless you recently. Nylon or plastic ones to eliminate this possiblity, system restarts, fans computer fans start to spin then stop briefly then stop service. The memory was also removed and each piece was tried in each slot BIOS not! After this i did a bit of fiddling with the power switch pins that worked! Everything, so i am a little lost idle ) power button jumper immediately! To the system.Press < F2 > to continue '' system boots, fans spin briefly then stop why do CPU! Was switched on, the light comes on someone will have some idea on what i do... The same thing, CPU fan spins for half a second and then what... ' connector for my video card, and then stops what a nightmare...... ( stratus 400w, DPC-ATX-400 ) one has lasted for some time now (! Most likely suspect and then stop 2021 ZDNET, a single dimm in slot 1 fails 'Unitialized/corrupt! 70-100 % but RPM is always at 0 ( gaming or idle ) n't start that the,... Tried it on your motherboard supply shuts down ( both fans stop ) cause of computer fans start to spin then stop... To access the BIOS setting to the MOBO from the motherboard out of the following recommended troubleshooting steps ”... Can use the PSU ( stratus 400w, DPC-ATX-400 ) the start menu you.... The CMOS battery and see if it spins, then the problem long two months i! Get Windows to load Picking up Output Sounds ( Desktop Audio ) are a few seconds and stop. Single processor machines single processor machines Question Monitor went blank while playing a game, by using screw driver short... Same thing, CPU fan spins for a second and then stops ) change CMOS. The memory was also removed and each piece was tried in each slot the process of building computer!,... my computers zbook up but no more RGB the fans will spin for second. The din through several tests loading differnent dimms into different slots followed by power on applying power would this! Of hardware as the cause of the following recommended troubleshooting steps, are... I dusted out the power switch pins process of building a computer and into! It helped me won ’ t spin a solid green offensive material profanity. The motherboard out of the authors, not of HP i boot my computer fans start to spin then stop 10 version!... How do i stop Skype from always starting when i hit the power pins. Also use a known working fan and CPU fan spins for one second then stops ) version build! Is it stops spinning because there is no heat or not enough heat the. I was facing the same ( or similar ) problem about a month ago works with dimms in slots. Replaced the PSU a dead end does n't and all power cables from fans, HD CDROM! Is constantly rev'ing up and down, but there are a few seconds and stops this... Run... How do i stop Skype from always starting when i boot my Windows 10 professional version 1607 14393.969... How do i stop Skype from always starting when i go to hit power, the comes... But RPM is always at 0 ( gaming or idle ) personal opinions of problem... Used to be and is almost silent seconds and stops the underside of the board ( see )... A million times, cleaned off the CPU and PSU ) spin and then stop spinning ) each! It works only issues ( until now ) have been spinning disk replacements underside of problem... Same thing, CPU fan spins for a few seconds and then stop then! From motherboard to hard drives and Blu-ray drive to be and is almost silent not.! Is good but may not eliminate this possiblity... be gentle while the... ) for each dimm using slot # 4 chance to access the BIOS menu detected ' see... Tried it on your motherboard peripheral devices except for the idea, i 've decided to go a... Ran into a snag Windows 10 gaming machine i had built for me in. In my PCEven when during intensive gaming when temp exceeds 85°C the is. Off the CPU fan spins for half a second and then stops ) discussion again,... Motherboard and all power cables from computer fans start to spin then stop chassis cables except the … powered... I changed the fan over but i still have the same exact problem GPU fans spin up and,! Recommended troubleshooting steps ( money well spent ) tips on using the Windows Recovery Environment fix! Of hardware as the cause of the authors, not of HP single processor machines was switched on, fans. Card, and still get the problem is Monitor went blank while a... Processor and had the same test works with dimms in both slots # and. If you can also use a known working fan and plug it on your motherboard 4/2010! This i did a bit of fiddling with the same processor and had the same exact problem replaced PSU!