Dead fan, a really common failure in power supplies. Fans only spin at startup for like 2 seconds and then stop spinning. Power Supply starts then stops - posted in Internal Hardware: It rained last week and I got some water in my basement. With that PSU I don't think there's a fan off mode. System boots, fans spin, system restarts, fans spin, system restarts, fans spin, etc. When the system is shutdown (but not powered off), the PSU fan spins for about 10 minutes. Also, I don't even know for sure if it's really fan sound. The PSU fan speed is related to the power consumption and temperature, the more power you use or draw and the warmer the PSU gets the faster your PSU fan will be. So connect them for less then a second (literally touch) and then … Upon booting, PSU fan and CPU fan again spin for a second and then stop simultaneously. Never give me any problem or whatsoever. You will see something of the same. Consider formatting your parts list. New comments cannot be posted and votes cannot be cast. Planning on building a computer but need some advice? /r/buildapc is a community-driven subreddit dedicated to custom PC assembly. It sounds like it. Turned on the psu outside the case with a clip and it goes full power too. Home PC won't start up with new motherboard. Now, the reason why the PSU stops powering the card is where the culprit hunt starts. If your computer turns on, and stays on, with essential hardware only, proceed to Step 10. The case fan too. then we strongly recommend that you Download (What happens when a PSU fan stops?) 1. Powered on confirmed that the PSU fan was working ok. Fan Noise. It sounds like fan noise and it comes from the bottom of my PSU. Why do my CPU and case fans spin but no startup? I removed all the RAM and powered on. It is only loud because it is “calling for a lot of CPU’s”, I think that is what Cal said. I did some investigating and saw what the answer was. I've seen it all. I have the AX 760. Start your PC with essential hardware only. The graphic card XFX GTS 250 512Mb is powered with a 6pin connector. Computer Building: 1: Oct 8, 2020: R: Question Monitor went blank while playing a game. This is the place to ask! New comments cannot be posted and votes cannot be cast. Otherwise, I wouldn't worry too much about it. Do understand that opening the PSU is 1. dangerous, those capacitors can carry a hell of a shock, and 2. breaks any and all warranty. What cause it? Full repairs starting at $19.95. PSU fan spins briefly then stops. The sound is on for maybe 2 minutes, then stop for 4-5 minutes, then on for another 2 minutes. https://www.youtube.com/watch?v=_ktrLPg-6rA. Hi, so I recently finished a PC build and I went to power it on the fans spun, but no startup. Archived. reinstalled drivers, removed msi afterbuners, installed a ancient gt 640 (fans worked). It's zero RPM until 70% of load, which is 532 watts. The replacement PSU lacked a 2nd 'P4 12v' connector for my video card (Radeon HD5770). I have around 7 pcs with this problem. In fact it's on right now and my GPU isn't even running. http://www.corsair.com/en-us/hx-series-hx750-power-supply-750-watt-80-plus-gold-certified-modular-psu. My machine was on the floor. Just sitting here web browsing and the fan turns on. AKiTiO Node PSU fan starts, then stops, repeatedly until slowly starting and then spins fine? Not too loud, but certainly audible from the inside of my case with the side panel on. Close. Question what do people think as a get started streaming gaming PC? Tried both bioses, both were flashed successfully when i got the card from a miner. This is the place to ask! The site may not work properly if you don't, If you do not update your browser, we suggest you visit, Press J to jump to the feed. Builds: 2. 20% of 750 is 150 watts. In the end the problem was something totally different then we thought. The thing is that it doesn't make that noise all the time. Take a look for yourself. etc. I hooked up a loopback and it just spins briefly and then stops. I don't know, because I never heard this noise before and normally when i play game, the sound of gaming drown out every other sound. The problem follows the psu. Planning on building a computer but need some advice? Build a PC What happens when a PSU fan stops? Remove CPU Power. Now, take a look at any of their various PSU's. 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. If not, is the fan noise really noticeable, or just barely audible over other ambient noises? It doesn't appear in any feeds, and anyone with a direct link to it will see a message like this one. Last Post RSS MacFreekDotKext (@jatechnology) Eminent Member. Press question mark to learn the rest of the keyboard shortcuts. Press J to jump to the feed. Same behavior. Turns out, my PSU fans never spins at all because I never hits the wattage to turn it on. Tonight I notice that there is a noise from my PSU that I never heard before. If you have What happens when a PSU fan stops? Second of all, the max +12v output that PSU can reliably do is 350-watts and each rail can effectively use only half of that(ish). Place it back in, fans spin a bit at the start then stop. One day I was cleaning it my computer and turned it on with the window off. As foon as the pc starts up the fans start going full power and never stop. (Other of the same type don't do this) Also when I use another psu in that case the case fan runs normal. I dusted out the original PSU and re-installed it. Help Your PSU doesn't spin until it hits 20% of its total wattage. If your computer continues to turn off by itself, proceed to Step 11. I have an OptiPlex 3010 which has decided not to start up. Thread starter Reachable; Start date Apr 18, ... it's usually straightforward) and the fan appeared to spin for a while and then apparently stopped. 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. The purpose here is to remove as much hardware as possible while still maintaining your computer's ability to power on. Remove all connections from motherboard to hard drives and Blu-ray drive. I have used this machine for a little more than 2 years. I have no idea what to do. I notice this sound right now when I'm not doing anything significant or taxing to the system. Be descriptive. On Boot CPU fan Spins then Stops, Computer starts as normal by AwesomeAndy Mar 16, 2005 4:15AM PST I am running an AMD Athlon at 1 gig on an Asus A7V Mobo. List anything you've done in attempt to diagnose or fix the problem. I have tried unplugging the PSU and holding power for 30 seconds and that didn’t work. etc. If the PSU fan stops working, then its components can get overheated and may result in serious damage to the PSU components, and to your other components too in some cases. Sorry, this post was deleted by the person who originally posted it. And just to be sure, is the sound not just from the HDD vibrations affecting the case? Repair Tool. The PSU has 2 such connectors. PSU is a evga 750G+ supernova @1.5 years old. Send it to EVGA for repair or replacement. The sound is on for maybe 2 minutes, then stop for 4-5 minutes, then on for another 2 minutes. Here's mine: http://www.corsair.com/en-us/ax760-atx-power-supply-760-watt-80-plus-platinum-certified-fully-modular-psu. This is the first time it happens and I don't have any experience with PSU. With one of them the PSU fan starts to spin without booting the system (just powered on) Are you sure it's not just part of the "Zero RPM" feature where the PSU stops the fan under low temps? The paperclip test is the act of shorting the two pins (ATX 16 and 17) to soft-activate the power supply. Joined: 3 years ago. Whatever causes it disappears on restart. It freaked me out. Computer Building: 3: Oct 28, 2020: J: Question Windows Starts Inconsistently, All fans stop when Windows loads then starts up again. no, the sound doesn't come from GPU. PSU fan spins briefly then stops. Some are at the low end like 20, some are at the high end like 70. Many of Corsairs fans have zero RPM mode, and the thresholds for 'zero' are all across the board. Page 1 of 2 - Fans spin for half second when cpu is installed. June 9, 2018 5:15 am Hello, I am having a new issue with my AKiTIO Node. Generally a fan twitch means that the power supply has a fault and is shutting down for protection. If you really want to find out for sure, get one of those things that monitor wattage from the wall. Two weeks ago the PC would not turn on and figured it must be the PSU, so I replaced the original PSU with a Corsair CV450. Tonight I notice that there is a noise from my PSU that I never heard before. Looks like you're using new Reddit on an old browser. What actually starts the PSU, is a short pulse on the wire. When I power it on, the fans start, the green light on the back of the PSU lights up then the 3 & 4 LEDs on the front panel flash before the box turns itself off. TIP: Click here now to repair Windows faults and optimize system speed. Was convinced it was the mobo so we bought a new one. I see the fan wasn't spinning at all. Posted by 2 years ago. Bought a PSU tester and everything passes on the PSU. Post relevant photos of build/parts here. If the PSU is still under warranty (can vary from 1 to 7 years depending on manufacturer) then get it replaced. Any other issues other than noise? I replaced the onboard battery. Anyone is welcome to seek the input of our helpful community as they piece together their desktop. Posts: 46. I have returned the CPU and the Motherboard, both are new. CPU fan starts then stops - posted in Hardware, Components and Peripherals: Hello, I am building a new PC, and having issues. Right now if the fan is loud when I start the computer, all I have to do is let the computer finish Start up, then I click Restart and when the computer restarts the fan is normal and quiet. Remove all power to hard drives and Blu-ray drive. When I opened the PSU, the fan was, somehow, slightly detached from it's "regular" spot, and due to it being not in a fixed position, it was rapidly moving forward and back, and that was the source of the grinding noise. Try a weaker video card or a stronger PSU. Other than that, no problem at all. The thing is that it doesn't make that noise all the time. Is there anything I can do? Fan issue persisted. Take a look at the tech specs tab. the fans start pulsing every few seconds) and nothing else happens - … Provide any additional details you wish below. 13 years ago In reply to Fans Spin then stop Thanks for your help, but it has been a long two months and I am still stuck. Describe your problem. All worked well for 2 weeks. The chassis fans don't start, and the CPU and graphics card fans spin briefly and then stop. I'm 100% sure the noise come from the PSU because I literally pull the side panel and listen to it to make sure it comes from the PSU. This will definitely affect your work, cost you money and will lead to mental stress because you don’t want to have a burnt PSU in the middle of your work. Same fan issue persisted. A short video showing how a PWM fan controller can mess with a non PWM fan. 11 years ago In reply to Push start button, fan ru ... Hi Tyler, i have the same problem. What is your parts list? It's somewhat subtle, but my system is pretty quiet so I can pick it up, and beside it's different from normal sound that my system normally makes. Anyone have information on how to prevent the install from happening on start up? The fans in PSU's are largely standard fans. How to fix a fast spinning PSU fan Clean out the dust . Is it dangerous? We use cookies to … I think it's broken. It sounds like fan noise and it comes from the bottom of my PSU. Press question mark to learn the rest of the keyboard shortcuts. List any error messages and symptoms. Suddenly, today, when I turn on the PC the fans start, then stop then start (i.e. Does it sound like that? That's not enough to drive the 6950, in fact I think you're overdrawing on boot when the rig first starts up before the system can even get into idle. We put in a new PSU in it but still no booting. My acer aspire laptop turns on the fan starts for a few seconds then stops and i get nothing please help - Answered by a verified Tech Support Specialist. Can you tell if the fan behaves differently under different loads (idle on desktop vs playing a graphically intensive game)? Re: Power Supply starts then stops after manual start up as far as I recall, green and black wires do not need to be connected. All the case-fans, cpu heatsink fans are off. Any help would be appreciated. /r/buildapc is a community-driven subreddit dedicated to custom PC assembly. It might be because the PSU itself can't handle it anymore because it's low quality or it's short on wattage, or because the card is being restricted from receiving all the power it needs on Windows power settings or on GPU power settings. - posted in System Building and Upgrading: Hi, Im bulding a new computer and have run into some trouble getting it to boot. Both GPU and CPU temperatures are pretty cool. 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