Do not attempt to open the power supply to clean the fans. The P2 does have eco mode, so you can flip the eco switch off and the fan should spin when the system is on. I used a can of all purpose spray lubricant (Yeah I know WD 40 is not lubricant) and I sprayed it into the power box through the back aimed at the underside of the fan and voila. my system that is running Prime95 (small FFT test) for the last 12 hours and the all four cores of my i7-3770K are at a constant 89degC when clocked at 4.8Ghz but the my new AX760's fan has not turned on for the last 12 hours. Do not attempt to open the power supply to clean the fans. When touched, it's case is not even warm...hence not turning the fan. Status Not open for further replies. When you plug the power from the wall into the power supply, the fan should move. Ensure to power off the PC and disconnect the power cables and use a compressed air canister to clean any dust or debris. Definitely doublecheck which you have. ... Power didn’t turn the PC on, hit the reset switch and instant smoke from the ram. Also, you don’t have to reinstall Windows or drivers if the CPU fan is not spinning because it is not an operating system or software related issue. Antec VP700P plus power supply 1 external fan 2x brand new Cooler Master MF120 Halo white RGB fans- using at front of case for intake PC up and running have bought the 2x halo fans recently, have installed both at the front for intake. PSU fan not spinning. If not, then you might need a new power supply. Wow I used to stick my screwdriver through the grill and stop the fan on my power supply but after that stopped working I knew I had to find a better way. I happened to look behind the PC last night and noticed the power supply fan would spin, stop, spin, stop over and over. E.g. If your motherboard is not getting power and the case fans are also not spinning, then it is an issue with the power supply, and you need to get it replaced if it is faulty. FML. The G2 does not have that ecomode, so if you do have a G2 and if the fan is not spinning I would advise you call tech support and set up an RMA. Warning: Desktop power supply units (PSU) is also equipped with a fan. This makes me think that you should not risk running a PSU, no matter how low power, without a fan, unless it's a specially designed fanless PSU. First diagnose the bad or failing power supply. My PC is essentially new and overall it has been working OK. >I was just plugging a different mouse into the back of my computer and realized that my PS fan isn't spinning.< I learned the hard way NOT to mess with mice while a computer is running. Later I checked it again and the fan was not spinning at all. We’d suggest swapping out the power cable you’re using, and possibly trying a different wall socket before going down that road, though. If the fan doesn't move, you have a dead power supply. Hi, I have a Silver Stone SFX 700 watt power supply.. the fans do not spin at all.. 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