cpu fan turns on and off won t boot

Only had PSU, CPU and 1 stick of RAM in. Refrain from spraying any cleaning agents onto any parts, as this can seriously damage a variety of components. Same sypmtoms persist. … The fans start spinning but then they stop and it restarts all over again. Just did this. - I dusted the case, (it was not that bad anyway). Opened the case. For this step, you'll need to turn your computer off, unplug it from the power source, and open up the case. The 2 second on-off cycle of fan and power light continues without any display or booting. – rnso Jun 2 '14 at 13:47 If you've gone through the rest of the steps above without luck then i would say it's time to replace the motherboard, most have a several year warranty so … Clean the CPU fans. Now when I turn on the PC it won't even get to BIOS, my monitor turns itself off and the CPU fan cuts out after 5 seconds. Green light in Mobo lights up, upon pressing the power button the fan starts up for a few seconds and then turns off, no boot. Powered the system on. Failure to do so may cause damage to the motherboard. Both service and cpu fans spin briefly then stop.. then this repeats on and on. Same sypmtoms - I replaced the service fan. Sometimes it happens when I'm playing a mmo that takes up a lot of cpu, which used to be normal, but lately it kicks on when I hardly have anything running and have only had my computer on for about an hour or so. Once opened, you can clean the interior and remove dust with an air gun or canned air. ... make sure it turns on and power the machine off. Always turn off your computer and unplug the power cord from the power outlet before clearing the CMOS values. Please see video below for what happens. I powered off the system. • After clearing the CMOS values and before turning on your computer, be sure to remove the jumper cap from the jumper. It did the exact thing. So I turned off the PC and went to find a MBR tool on my other PC. Now that the i5 arrvied I put it in but the PC won't boot. Page 1 of 3 - PC does not boot, no (post beep, light, or display ) fans running - posted in Internal Hardware: When I boot my pc, all fans are running, no post beep, no pc display. After reassembling the computer, I tried to boot it, but it won't start - the computer's fans (the normal one, the CPU's and the PSU's) went on for a second, and then off, repeating every three seconds. Took Mobo out of tower and placed it on cardboard. No display is available when this happens, no beep code. Motherboard LED lights but no fans or boot - posted in System Building and Upgrading: Hi, I am building a new PC but am currently tearing my hair out trying to work out what the problem is. I don't think I should do it with the system on.. This happened out … Computer fan won't stop running Recently, my computer fan kicks up sometimes and just doesn't stop running. Take the old CPU out and put your i5 4460 in. 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