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. - I dusted the case, (it was not that bad anyway). Were any providing a ground to the MOBO?? My search for an answer led me here, but this was a dead end. It did for me. It seemed to work fine. 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. No display as well. ‎07-01-2018 I have attempted to unplug everything except the … 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. 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. I like to replace all the standoffs with nylon or plastic ones to eliminate this possiblity. Thank you for the ideas. Both service and cpu fans spin briefly then stop.. then this repeats on and on. 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. BUt once it hanged . But the start button light remains on. - I dusted the case, (it was not that bad anyway). Notice the CPU fan spins for half a second and stops. The power supply fan starts and the CPU cooling fan starts. Remove all connections from motherboard to hard drives and Blu-ray drive. Please remember to be considerate of other members. Boot error showed "ERROR: System Fan Has Failed.Service PC to prevent damage to the system.Press to continue". Reboot as needed to test. The replacement PSU lacked a 2nd 'P4 12v' connector for my video card (Radeon HD5770). I proceeded running through several tests loading differnent dimms into different slots followed by power on. A solid green PS LED is good but may not eliminate this piece of hardware as the cause of the problem. Disconnect the USB 2.0 card reader. ... voltage gets below 2.6V then there is a chance that the settings can become corrupted which can prevent a normal start … A good set of fans can keep your computer from overheating, but they can also make your computer sound like a wind tunnel. Then this repeats and repeats... ERROR: System Fan Has Failed.Service PC to prevent damage to the system.Press to continue". Computer won't turn on. This will reset the BIOS setting to the “new” computer defaults. Disconnect all SATA devices. You can also use a known working fan and plug it on your motherboard. 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. Check out this web site for tips on using the Windows Recovery Environment to fix system corruption. Opened the case. I've decided to go with a new computer. Why do my CPU and case fans spin but no startup? Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Powered on confirmed that the PSU fan was working ok. If it spins, then the problem is with your fan. PC startup problem: PC startup problem 3. Home PC won't start up with new motherboard. It's working great except for the fan is constantly rev'ing up and down, but I'm not doing any intensive tasks. The same test works with dimms in both slots #3 and #4. this action keeps repeating. The memory was also removed and each piece was tried in each slot. 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. Computer Building: 1: Oct 8, 2020: R: Question Monitor went blank while playing a game. Pros couldn’t find anything wrong. If it spins, then the problem could be the motherboard or power supply unit. After this I did a bit of fiddling with the power button jumper. 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. Installed 1 DIMM, powered on  and finally the computer BIOS loads! Remove all power to hard drives and Blu-ray drive. Upon booting, PSU fan and CPU fan again spin for a second and then stop simultaneously. At this point, I've removed the video card, and still get the problem. Start by Cleaning Your Computer's Fans . Thanks for your help. 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. Laptop users will need to test on a different computer. This conversation is currently closed to new comments. Try each memory module in each memory slot. The motherboard shows the dimm slot numbers. This one has lasted for some time now, (money well spent). Once back on its speed is what it used to be and is almost silent. Or were some standoffs shorting the power supply?? I took out the power supply and tried it on another motherboard (without any other loads). I dusted out the original PSU and re-installed it. I powered off. Thanks for the info. 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. Reboot the PC after each of the following recommended troubleshooting steps. Please note: Do not post advertisements, offensive material, profanity, or personal attacks. Same fan issue persisted. The Motherboard green light is on, but other than the cpu fan spinning for a second I get no other signs of anything starting. - edited 07:57 PM Maybe the powersupply is on its way out? Any error messages? Computer Building: 3: Oct 28, 2020: J: Question Windows Starts Inconsistently, All fans stop when Windows loads then starts up again. Same behavior. Here’s how to control your PC’s fans for superior cooling when it’s working hard, and silence when it isn’t. Run a checkdisk if you can get Windows to load. 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 also tried another PSU. When I go to hit power, the fans spin a second and then stop. † The opinions expressed above are the personal opinions of the authors, not of HP. The systems is pretty old (purchased 4/2010). RMA'd the … Powered the system on. Your PC may trouble you when it does not start up correctly the fan spins for a few seconds and stops. 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. Same sypmtoms persist. I scrounged up a good PSU from someone and it did the same thing. Any POST error messages? ‎07-13-2018 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). Powered the system on. ... Be gentle while cleaning the computer, note the fan-filled with dust. I have returned the CPU and the Motherboard, both are new. During gaming GPU z shows fans speed % ~ 70-100% but RPM is always at 0 (gaming or idle). But that's assuming some wayward setting is causing the fan to stop … Right now its working. No such thing on all my previous single processor machines. A recent Windows 10 update restarted my system. CPU= AMD 3700+ (ada3700bnbox) mobo= Asrock 939s56-m When switched on the fans all spin … I replaced the PSU (stratus 400w, DPC-ATX-400). The hard drive tests are OK but the Boot Path test fails, 'Unitialized/corrupt boot structure detected' (see attached). If you're new to the TechRepublic Forums, please read our TechRepublic Forums FAQ. Time to upgrade to some newer technology. 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. I dont know what to do. ‎07-13-2018 06:08 PM However, a single dimm in slot #4 works. I feel like such a dunce! Opened the case. PC won't boot, fan starts and then stops What a nightmare, ... My Computers zbook. But since then sometimes the computer starts sometimes it doesn't. When I hit the power button, the cpu and gpu fans spin up and them immediately stop. Disconnect all peripheral devices except for the mouse, keyboard, and monitor. 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. After that to leave it off for 30 seconds then boot it up again. Good luck. Everything else works fine in my PCEven when during intensive gaming when temp exceeds 85°C the fan won’t spin. I thought I have ruled out everything, so I am a little lost. I proceeded to run a diag test (F9) for each dimm using slot #4. Set a temperature threshold. I tested the PSU with a purchased PSU tester. 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. They all passed! Thanks for your help, but it has been a long two months and I am still stuck. - edited 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. Tried turning on the PC again. CPU failure is low unless you have recently reinstalled the CPU or have messed with the CPU in any way. 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. Then put the cable back into it and the original symptoms occured. 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. Now remove all RAM modules. When I go to hit power, the fans spin a second and then stop. 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. You can use the PSU, case/chassis or GPU fan header. I am setting up a new machine tonight with the same processor and had the same exact 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. Bought a PSU tester and everything passes on the PSU. The only thing that has worked is after booting, is to log into windows then shut it down through the start menu. 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. I changed the fan over but I still have the same problem. I have a new Windows 10 gaming machine I had built for me back in July. My computer wasn't starting. Below are the relevant specs: © 2021 ZDNET, A RED VENTURES COMPANY. 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. Change the CMOS battery and see if it works. It'll spin again after that, but no more RGB. 11 years ago I've searched through the threads but i am still unsure of what my computers problem is. Some standoffs need insulating washers to prevent shorting and would go on the underside of the board. I plugged it in and all is well. NOTE: the PS LED light is solid green. (The power light is on on the motherboard but when powered up the CPU fan spins for one second then stops). They spin only when they need to, when you boot the computer it doesn't have a temp reading yet, so it will start at full speed. The PSU tester shows everything as good. The CMOS has been cleared and I removed the motherboard and put it back in with new screws and standoffs. etc. 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. The only issues (until now) have been spinning disk replacements. The fans ( CPU and fan was set at 115 after booting, to! 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