Our community of experts have been thoroughly vetted for their expertise and industry experience. When it starts and then stops after one second indicates that it either has a shorted output or has not come to full voltage. Bought a PSU tester and everything passes on the PSU. The fans stop for a second, but then start but up again at high speed, and nothing else. Power button and reset button on mobo stay lit, but nothing else. Solved. It's good to narrow it down.That was a great idea to check the voltage switch, but it was set at 115. 1 is an Athlon XP system the other is a P4 system. My PC wont start the fans spin for a second and then stop. I press button button, and i get nothing, no display or lights. After about 3 seconds it then tries again. Never had this issue before usually the gpu runs at about 84 degrees constant with normal fan curve. 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. 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?). Understanding Bash: A guide for Linux administrators, Checklist: Managing and troubleshooting iOS devices. While the FANs do spin for a second, it's most likely a short circuit. Then 3 seconds later they start again and then stop (the PSU light blinks off for a split second each time the fans restart). I have a friends PC, when you press the power button the fans spin then they stop again. I would try a better quality power supply. 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. Apr 3, 2005 #1 I currently have 2 computers from 2 different friends with the same problem. 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. It then stopped completely. 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. Yesterday i tried to start it but nothing.I took a close look inside the case and i saw that when i pressed the start button the cpu fan started to spin,same a 12cm fan from the back of the case,same for the psu's fan but the gpu's fan was spinning for like 1-2 seconds then stopped. Power button and reset button on mobo stay lit, but nothing else. Thanks for the idea, I took the motherboard out of the case and it still would not start. Joined May 12, 2011 Messages 8,296. 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. Forums. I thought I have ruled out everything, so I am a little lost. 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. Hardware and Technology. Microphone Only Picking Up Output Sounds (Desktop Audio). Turn on the power and verify that the fans are working and voltages are present. When you first hit power from a cold start, the CPU fan spins for about 1 second, then completely stops as the computer is booting. Look on the logic board around the heat sink and see if you see any oily type looking residue. So, back to your specific question--in my experience (starting in the early 90s), if a computer had some life left you would get at least get the case fans to spin up real quick and then they'd stop. Previous Next the unknown Senior member. The other day after putting it together (with an old PSU I had lying around too) it would boot up for a second, show all the PHASE LED lights (red,orange,green,green), the fan would spin on the cpu, the psu, and the gpu, and then it would immediately shut itself down again. I notice this happen shortly after turning on my computer or bringing it out of sleep mode. It did lead me to realize it was a power problem so I reread my power manual and 45 frustrating minutes later I found that there is an extra 4 pin power connector next to the processor on the mb! 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. 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. I realised that the cpu fan wasn't spinning and eventually bought a new replacement fan. It is like having another employee that is extremely experienced. When i try and turn it on the fans spin up and it kicks into life for about a second then just cuts out. with this setup I still have the same problem the fans spin for a split second then stop EDIT: sorry for reviving a dead thread, but it was wat pulled up in a google search :< K Being involved with EE helped me to grow personally and professionally. 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