Any error messages? I tested the PSU with a purchased PSU tester. They all passed! Please note: Do not post advertisements, offensive material, profanity, or personal attacks. 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 took out the power supply and tried it on another motherboard (without any other loads). Notice the CPU fan spins for half a second and stops. I proceeded to run a diag test (F9) for each dimm using slot #4. Check out this web site for tips on using the Windows Recovery Environment to fix system corruption. 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. Now remove all RAM modules. Disconnect all peripheral devices except for the mouse, keyboard, and monitor. 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. Boot error showed "ERROR: System Fan Has Failed.Service PC to prevent damage to the system.Press to continue". Both service and cpu fans spin briefly then stop.. then this repeats on and on. Some standoffs need insulating washers to prevent shorting and would go on the underside of the board. Same results suggests you have a motherboard issue. Fans only spin at startup for like 2 seconds and then stop spinning. Thank you for the ideas. 06:08 PM I had another spare GPU to test if the motherboard was fine and it booted up properly. I was facing the same (or similar) problem about a month ago. However, a single dimm in slot #4 works. Powered the system on. 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. I thought I have ruled out everything, so I am a little lost. The fan spins for a second or two when first switched on but then switches off. Below are the relevant specs: © 2021 ZDNET, A RED VENTURES COMPANY. The system won't boot further than this, ie: I don't have a chance to access the bios menu. I feel like such a dunce! Home PC won't start up with new motherboard. Here’s how to control your PC’s fans for superior cooling when it’s working hard, and silence when it isn’t. Other combinations fail. A solid green PS LED is good but may not eliminate this piece of hardware as the cause of the problem. I removed all of the chassis cables except the power switch and tried to flip it in case it was in backwards. Any advice on fixing the boot path problem? Please remember to be considerate of other members. Posts : 36,805. windows 10 professional version 1607 build 14393.969 64 bit New 26 Nov 2019 #5. 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. Tried turning the computer on again, by using screw driver to short the power switch pins. But that's assuming some wayward setting is causing the fan to stop … Power on issue: system and cpu fans start briefly then stop.... Power on issue: system and cpu fans start briefly then stop. The replacement PSU lacked a 2nd 'P4 12v' connector for my video card (Radeon HD5770). A 2010 PC is prone to component failure after about eight years of service. 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. Removing the MOBO from the chassis and applying power would confirm this. Your PC may trouble you when it does not start up correctly the fan spins for a few seconds and stops. - I dusted the case, (it was not that bad anyway). fyi. Bought a PSU tester and everything passes on the PSU. Same sypmtoms persist. 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. 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). I am in the process of building a computer and ran into a snag. Powered the system on. This one has lasted for some time now, (money well spent). I changed the fan over but I still have the same problem. No change. Adjust the power settings, let the computer cool for a few minutes, and then troubleshoot the noisy fan. I do not get any POST beeps. ... Be gentle while cleaning the computer, note the fan-filled with dust. ALL RIGHTS RESERVED. Remove all connections from motherboard to hard drives and Blu-ray drive. 07:57 PM Right now its working. I've decided to go with a new computer. PC startup problem: PC startup problem 3. Stay tuned! Try a known good PSU. It's working great except for the fan is constantly rev'ing up and down, but I'm not doing any intensive tasks. 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. The same test works with dimms in both slots #3 and #4. If still no luck then the power supply is the most likely suspect and then the MOBO. The PSU tester shows everything as good. Didn't find what you were looking for? Opened the case. No such thing on all my previous single processor machines. Everything else works fine in my PCEven when during intensive gaming when temp exceeds 85°C the fan won’t spin. Thanks, your right, it was that. Same behavior. It's good to narrow it down.That was a great idea to check the voltage switch, but it was set at 115. Tried turning on the PC again. 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. (The power light is on on the motherboard but when powered up the CPU fan spins for one second then stops). Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Your situation may be a unique convergence of a coincidental hardware failure happening after a W10 update. I plugged it in and all is well. When I hit the power button, the cpu and gpu fans spin up and them immediately stop. Remove all power to hard drives and Blu-ray drive. Disconnect the USB 2.0 card reader. 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. 07-01-2018 I like to replace all the standoffs with nylon or plastic ones to eliminate this possiblity. It might sound a little strange but it helped me. after this the PC started. A good PSU from someone and it would n't start up correctly the fan spins for half a and... You 're new to the TechRepublic Forums, please read our TechRepublic,! Suspect and then stop spinning dusted the case, ( it was that! But there are a few things you can also use a known working fan and plug it your... 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