Dec 26, 2013 12 0 10,510 0. I tried to turn it on after and it wont boot. Systems. Rechecked the cables and plugs a million times, cleaned off the CPU and fan. Power cord is fine, f10 will not start BIOS. Fans spin (heatsink, chassis) and power LED comes on, but no video. Idea was to reset BIOS. No lights come on at all. doing the same thing but only plugging in either the batter or the charger afterwards. Things I have tried: - unplugging the battery and charger, holding the power button for a minute, then plugging them back in and trying to start it. Re: Computer Won't Start, Fan on Full Blast Jump to solution Have similar problem and just posted a new thread on it: Power supply test - on button . My system is home built, the boot drive being a Samsung 850 EVO series m.2 SSD. I built my first PC like a week ago with no problems, updated bios and installed windows. Hardware. Previous Next Sort by votes. 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. PC won't turn on. … My problem is the same as many others I have seen listed. 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. Note: When I changed the Clear RTC jumper from Normal to Clear RTC, fans did not spin but Power LED came on. The fans would all spin fine though and continue on until I hard shut off. Thread starter bmc; Start date Jan 3, 2014; Sidebar Sidebar. Tried … Fans spin for half a second and then turn off. Fans spin loud. Forums. - letting it charge all night (with fans spinning). PC was working fine all these years, suddenly went to turn it on and loud fan noise, blank screen, pc won't boot. I unplugged all cables from the motherboard and all power cables from fans, HD, CDROM. Have tried all fixes listed. Status Not open for further replies. The fans were spinning loud but everything else just seems fine. Tried turning on the PC again. PC wont turn on. Everything worked fine until system required new heatsink/fan, and motherboard had to be removed from case. Here are my specs: ... Computer fan loud and won't turn on - … Troubleshooting. [Solved/Closed] Report. Tried turning the computer on again, by using screw driver to short the power switch pins. The keyboard would not light up either, only the mouse. Notice the CPU fan spins for half a second and stops. PC won't boot, fans spin, CPU LED lights up. But as of this morning, turning it back on not only does that, it also sometimes causes it to shut off and reboot to the same problem by itself. Does the same thing, CPU fan spins for half a second and stops. 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