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. Press Esc or F10 and select “save and Exit” press Enter and allow your system to restart then check … good news (i think).. tested the psu as per instructions and dito nothing.. so looks like its the psu.. i believe its the CPU, if you get power leds on the motherboard then it tells us that the PSU is fine. It sounds to me like the fan controller they use might be faulty. The lights would come on, the fans would spin (case fan, cpu fan, power supply fan, video card fan). By Ellis, May 9, 2017 in Power Supplies. All the led shows is that the 5 volt standby is working, nothing else. The 5 volts is good, ie the LED on the mOBO. Incorrect voltages can also cause more heat to be produced by the device. But to be safe, go ahead and get it replaced using those prior instructions. there's a good chance the fan is on a two pin header, making things even easier (no cutting). How to fix a fast spinning PSU fan Clean out the dust Same result with or without RAM. I'm not sure if this is a PSU problem but it sounds similar to the case where my last PSU died. Not true. Ethics Statement Terms of Use Privacy Policy Change Ad Consent Advertise. Booted PC, fans came on, MOBO light on, but no POST beep and no signal. In all these cases, the best solution to replace the fan with a new one. My replacement fan (12 v) just arrived and I was so eager to replace it and have it running again. This sounds like the power supply has failed. You always want your power supply facing down, in a bottom-mounted case. It appears the 12 volt section has died, thus no fans. It's nice that you have a supply that tries … Why is the fan not spinning in the computer power supply? This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. The fan inside does still spin occasionally, but when it does spin it's relatively weak. Check that it has not been accidentally been switched off. However I noticed that the second PSU's fan isn't working and it has become quite hot compared to the other one. PSU or Power Supply Unit is one of the most important components of a PC because it is the only component that provides power to all your internal computer components that include a processor, motherboard, hard drive, SSD, graphics card, case fans, etc.It can get hot during load and for this, it comes equipped with a fan for cooling. I know that my Corsair SF600 PSU (the SFX unit) features Corsairs zero rpm mode which keeps the fan stationary until the system draws enough power for the PSU to be put under load in hopes to keep a system quiet. If not replaced, it can cause additional damage to your computer. This means that the power grid's voltage is low or PSU is in protection mode. Don't get me wrong. Are you looking for the solution to your computer problem? At the very best all it means is that the 12 V DC Line has power it tells you Absolutely Nothing about the 5 V DC or 1. something V DC lines. replacing psu fans is easy. Checked PSU with PSU tester and it appeared faulty. 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. There is no beep however, and no video. Check on that, is it only 1 of them that isn't spinning? put a screwdriver on the pins that go to the power switch.. nothing happened. Unfortunately, new fans did not work also. Reply to this topic; Start new topic; Recommended Posts. Join over 807,865 other people just like you! Beginner; Members; 0 1 post; Report; Share; Posted May 9, 2017. O.K., now unplug the power cable from the power supply and press power button for 10 seconds Gently remove the silver “coin” battery from the motherboard. Be sure that the onsite technician turns the 8910 on and checks the replacement PSU fan. The fans actually go crazy, spinning at full force. Thanks for your reply - … Unique Dual Fans Technology: exhaust fan starts to spin when the power supply reaches certain temperatures to ensure proper airflow, the second fan spins on power up. © 2021 TechSpot, Inc. All Rights Reserved. Yes, there are some fanless PSUs available too but they … DO NOT press the button if you wish to include the Fanless Mode, which means the fan in the power supply will not spin when the power supply is under light loads. First diagnose the bad or failing power supply. TECHSPOT : Tech Enthusiasts, Power Users, Gamers, TechSpot is a registered trademark. It sucks it in through the fan grille, and blows it out the back. Anything I could test or attempt to fix before that? This site is completely free -- paid for by advertisers and donations. If you're not already familiar with forums, watch our Welcome Guide to get started. I'm just saying that you should never ever rely on the mobo led as a sign that the psu is ok. well i guess we wil see tomorow when i hook a new psu up. But I did get some small movement in the fans only after I had turned the PSU off and pushed the power button the first time to try to turn on the PC. Installed PSU but have same issue, MOBO light on, fans all spin but no … I'm afraid that it may be a faulty psu or mobo. Most power supply models have a light on back of the unit that glows when it’s powered on. If you know where they are, short-out the two pins with the jumper OTHERWISE just leave the computer unplugged for at least 10 minutes or longer. Light on and checks the replacement PSU fan does spin it 's relatively weak content, tailor experience. 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