The power supply LED is lit and not flashing, and the fan in the power supply runs. - Collapse - #Retro. Yesterday though, i tried turning it on and the fan suddenly stopped working after a few seconds. This time the fans ran at top speed! It froze up during game, so we had to shut the power off. In the last few months it would sometimes not start unless I turned off the power strip connected to the wall outlet and then turned it back on. Powered on confirmed that the PSU fan was working ok. The laptop itself dies two to three seconds later after the fan stopped. I hear the beep, and then in few seconds, before one saves and exits in BIOS, shuts off on its own. The computer worked fine for a year. The fan cables for CPU and Power are connected and are fine. When I turn it on, the CPU fan and the case fan turn on, but quickly slow down to a stop in about 3 seconds. These pc startup problem are found when the system detects some power issue. Fan issue persisted. Here is how to solve the problem of the pc startup problem. I tried turning it on again but the same thing keeps happening. The following is my Pc spec: i7 6700k Asus maximus viii hero Corsair rm750i I replaced the onboard battery. Other than that , I get no signal to the monitor and it goes directly to sleep. I had this issue before and after trying a different PSU and it worked, I therefore sent the PSU back, however the replacement PSU has the same issue. Remove all the peripheral device that’s connected Installed 1 DIMM, powered on and finally the computer BIOS loads! Thanks. ... Of course, once laptop is powered on, the fan starts to work at the POST stage too. The CPU fan spins for a few seconds then stops, the PC will not boot, there are no displays on the motherboard screen. It was my CPU fan which stopped working after 5 seconds while making somewhat of a strange noise (maybe it touches something). The fan stops after a few seconds but the laptop continues to boot till the CPU overheatsl. Runs fine for the first few seconds. I have an acer aspire 5710 laptop that ive had for nearly 5 years now. Have cleaned the fan and removed dust from fins but still stops. x220 • Gobi 2000 3g | hdd, msata ssd, wwan, wifi, gps -- unique config ThinkPad 25 Special Anniversary Edition. If I turn the laptop off before the CPU overheats, and then turn it back on, the fan again runs for a few seconds. I didn't trust this so I shut down the laptop and the next morning go to the local pc repair shop to have a look at it. Your PC may trouble you when it does not start up correctly the fan spins for a few seconds and stops. 13 years ago We had a power outage about a week ago and I had turned my cpu off since it was a planned power outage. I removed all the RAM and powered on. CPU Fan stop after few seconds ( T440 ) 2016-01-09, 13:15 PM. I dusted out the original PSU and re-installed it. 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