|Pretty evident. If any fans are not turning then they may be defective. There are some fans that are temperature controlled. In that case they may not be rotating all the time. There should be a large fan on top of the processor. There may be smaller fans on a couple of components on the motherboard. There may also be case fans in the rear or front of the case. |
Is your PC a prebuilt like Dell, Acer, eMachines, etc. or a custom built?