hey my psu has started to make a funny noise, im certain its just the fan because i stopped the fan on it and the noise stopped and then it comes back in and out every now and then, it sounds like bearings rubbing or something.... any advice what to do about it? coudl i just oil the fan? but that involves opening it and risk of voiding warrenty/death 

it only comes in now and then..... sounds so weird tho, not that loud but cos i want everything amazing i can hear it... damm being a perfectionist