I have a 1 month old Lenovo Ideapad y410p and the fan makes a weird clicking noise. It happens sometimes when I tilt my laptop but not always, sometimes when I turn on my laptop, and usually when I'm running CPU intensive programs. I tried opening the laptop and looking at the fan but I couldn't get the cover of the fan off because one of the screws wouldn't come out.
This is the sound it makes: https://www.youtube.com/watch?v=SIutZZoZb_8 (the noise that starts 4 seconds in is my AC not my computer)
It sometimes gets louder when I tilt the laptop. And when I'm playing video games it usually goes on the whole time.