Dec 22, 2007 374 4 81. Solved. MacBook Pro 15" Unibody Late 2011 Heat Sink Replacement MacBook Pro 15" Unibody (Early 2011-Mid 2012) Heat Sink - MacBook Pro 15" Unibody Late 2011 I don' notice this happening after my computer has been active for a while. ... stop for a 1 second, and then spin again for 5 seconds. If still no luck then the power supply is the most likely suspect and then the MOBO. At first i thorough it would be the power supply but I tried replacing that and nothing. Thank you for the ideas. They do the same … Our community of experts have been thoroughly vetted for their expertise and industry experience. The fans spin for half a second, then it immediately shuts off. I tested the PSU with a purchased PSU tester. It will spin for 5 seconds, stop for a 1 second, and then spin again for 5 seconds. After replacing the PSU I turned on the PC but i found out that the CPU fan will spin for half a second and turn off. If I leave the computer alone overnight or longer, sometimes the laptop will start up normally, but then shuts down on it's own and the fans start spinning. If I then hold the power button for 5-7 seconds, the led turns off. Please remember to be considerate of other members. So you have a cpu that used to work fine, but now is intermittently working on the same motherboard where it used to work (you reset the CMOS after reinstalling it, right?). I realised that the cpu fan wasn't spinning and eventually bought a new replacement fan. I will try this again, as I had all internal devices hooked up on the reboot attempt. Now, when I first booted up the PC the CPU fan started spinning and all seemed happy (hence me awarding the points on the other question) - until I installed the graphics card - then the problem returned. I tried moving the RAM stick to the other slot, and got the same result. I am in the process of building a computer and ran into a snag. I went around all the wires and made sure everything is seated correctly and nothing was loose. I am in the process of building a computer and ran into a snag. Below are the relevant specs: © 2021 ZDNET, A RED VENTURES COMPANY. Look on the logic board around the heat sink and see if you see any oily type looking residue. i7-4790k, Asrock Z97 Pro 4, … By the way, the fan was brand new and did spin up so must have got the required voltage to do so. My PC wont start the fans spin for a second and then stop. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. This can be caused by a corrupt CPU, Mainboard or the power supply itself. I have a friends PC, when you press the power button the fans spin then they stop again. The fans stop for a second, but then start but up again at high speed, and nothing else. A little bit later, maybe 5 … Motherboards . (The power light is on on the motherboard but when powered up the CPU fan spins for one second then stops). Dont believe me? While the FANs do spin for a second, it's most likely a short circuit. 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. This process repeats over and over. Jim. Then you had to find a open computer store to buy a new floppy drive. Specs: OS: Windows 8.1. If you're new to the TechRepublic Forums, please read our TechRepublic Forums FAQ. I was facing the same (or similar) problem about a month ago. OP. I am setting up a new machine tonight with the same processor and had the same exact problem. Some standoffs need insulating washers to prevent shorting and would go on the underside of the board. I thought I have ruled out everything, so I am a little lost. They do the same thing though...I hit the power button and the CPU fan spins for 1 second, then nothing. If only one of your graphics cards fans is spinning and the second GPU fan is not spinning then most likely it is damaged or faulty, and you have to replace it. I scrounged up a good PSU from someone and it did the same thing. ... Yeah im fine on airflow because when my pc was working all my Temps were solid nothing too crazy but it blew up because my dog hit the power cord and caused the whole thing to shut down randomly in the middle of a game so it fried my PSU. Page 2 of 2 < Prev 1 2. . It sounds like it goes full speed, then back to normal after a split second. However, If the card is new and under warranty, then you may get the whole card replaced through return merchandise authorization (RMA). 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. 2. Have to turn the psu off then on to be able to try again. fans spin for 1 second then nothing...? I currently have 2 computers from 2 different friends with the same problem. 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. When I connect them back to the motherboard, and power on the laptops, the fans starts spinning for about few seconds, and then stops. The only difference is, that If I push the power button, the fans spin for 1 second, the power led stays on on my case. 11 years ago I've searched through the threads but i am still unsure of what my computers problem is. It would continue interminably unless I unplug the computer. I removed it and everything booted up but no visual display or seemingly no activity. HD lights for a second, fan starts and nothing. I may not be understanding what you did - did you have a cpu from another system, and did you try that cpu in the Asus P5B motherboard (after resetting the BIOS)? I press button button, and i get nothing, no display or lights. 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. Now, my system does this when I try and turn it on. Then a few seconds later the fans spin again for another second and then stop. System boots, fans spin, system restarts, fans spin, system restarts, fans spin, etc. CPU: i5 - 4690k. Thanks for all your help. When I go to hit power, the fans spin a second and then stop. I purchased a new power supply unit (seasonic gold 550w) which didnt change the situation and I also purchased a … It then stopped completely. Now whenever I turn it on, the fans/etc. Tried turning on the PC again. Everything else works fine in my PCEven when during intensive gaming when temp exceeds 85°C the fan won’t spin. This award recognizes someone who has achieved high tech and professional accomplishments as an expert in a specific topic. It is like having another employee that is extremely experienced. The CMOS removal didn't work. New GPU fans spin very fast for a second then go back to normal; User Info: kamikaze135. Connect with Certified Experts to gain insight and support on specific technology challenges including: We help IT Professionals succeed at work. Bought a PSU tester and everything passes on the PSU. READ MORE. If I plug it in the fans spin up for 1/2 a second and then nothing. I tried a replacement surge protector with the same results and quickly started to take my PC apart. Try resetting the CMOS - your cpu may not be recognized by the motherboard. Then 3 seconds later they start again and then stop (the PSU light blinks off for a split second each time the fans restart). Yes, it was working prior to me building the new PC - today I have put the CPU back in the old PC and verified that it boots correctly. Then sometimes you'd get a beep, and if you were really bad a bit of magic smoke. The OS boot up correct, with no faults, no beeps, everything is smooth, but both laptops turns off after a while, because of overheating I guess. Thanks. Good luck. Screen does not power up but fan and hard drive spinning. 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. Experts with Gold status have received one of our highest-level Expert Awards, which recognize experts for their valuable contributions. Notice the CPU fan spins for half a second and stops. After about 3 seconds it then tries again. Thread starter obetskie1960; Start date Sep 28 ... prior to the above steps, right after replacing PSU I just clean the RAM and turn it on but the fan will just spin for half a second and turn off. Microphone Only Picking Up Output Sounds (Desktop Audio). OK, I only have one CPU (the Pentium 4 3.5 GHz (model 550)). Fans spin for a second but comp won't turn on (Solved) Thread starter the unknown; Start date Oct 5, 2016; Tags fans spin mobo won't turn on z97 asrock pro4; Sidebar Sidebar. turn on for approximately 1 second, then everything immediately shuts off. When asked, what has been your best career decision? Quiet with lots of RGB lights. The fans, DOESN'T start anymore. The fans spin for half a second, then it immediately shuts off. Was convinced it was the mobo so we bought a new one. Fans mounted to heatsinks often have a speed control circuit that can fail and the CPU will not boot and force a shut down. Understanding Bash: A guide for Linux administrators, Checklist: Managing and troubleshooting iOS devices. Thanks for your help, but it has been a long two months and I am still stuck. Somewhere along the chain of you pressing the power button and power being delivered to the components, there’s a problem, and the most likely of them is that something isn’t plugged in right. Wow, that's quiet, uh huh. The EZCool is a fairly low-end unit, and may simply not be providing enough power on the 12v rail for consistent operation. I removed the motherboard from the casing and put it on top of the table with cardboard underneath. Our community of experts have been thoroughly vetted for their expertise and industry experience. I tried re-seating the CPU, but got the same result. Modafroman Member. Close. Fans spin for half a second and then turn off. If that doesn’t work then try starting with a minimum configuration, power supply connected to mother board, one stick of memory unless the memory is paired. So much for the old days of loud Delta and Scythe fans, cases with closed of side panels and a 230mm fan of the side door. Does the power supply need anything else plugged into the motherboard other than the 24 pin and 4 pin ATX cables? Wow, that's quiet, uh huh. Power button and reset button on mobo stay lit, but nothing else. The CPU fan spun like before but no beeps or anything. My PC wont start the fans spin for a second and then stop. Consistent operation to those who need it most Checklist: Managing and iOS! 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