fan ramps up and down when I turn on desktop computer does not startup
To do so, put your ear to the case of the CPU. If you hear a humming noise, it almost certainly indicates that the fan is running. If, for some reason, the fan is not running, your CPU will overheat and the computer will refuse to turn on until the CPU cools down.If you smell acrid smoke, some component of your computer (mostly your motherboard) might have burnt out.It will need to be replaced.f, for some reason, the fan is not running, your CPU will overheat and the computer will refuse to turn on until the CPU cools down. If you smell acrid smoke, some component of your computer (mostly your motherboard) might have burnt out. It will need to be replaced.