december 2016, at the middle of december, i purchased a new acer e5-475g the kaby lake version, after using it for some couple days, the fan making some kind of grinding sound so i'm turning off my laptop then booting it up again, it gone. after several weeks of usage(almost 1 month approximately) it started making the same noise, but sometimes the sound of it is loud, sometimes not. it usually happened after i left my laptop on cold room at the table overnight, but that sound doesnt show up everyday, only several times. i don't know what's going on with my laptop, many people say it could cause/caused by overheat, but i don't think mine caused any of that or by any of that, because i usually use a cooling pad, which is cooler master notepal x3. i already checked some things such as checking the temperature, i also tried to feel the airflow, but i couldn't really feel the airflow, because almost the whole part is occupied by the copper heatsink, i tried to push the body at fan part a bit, and the fan noise louder if i do that, but after waiting several minutes usually the sound gone. can anyone please help me? or share your experience if this problem have ever occur to you? thanks
acer E5-475G-53IQ
spec:
-i5-7200u 2.5ghz turbo to 3.1ghz
-4gb 2133mhz ddr4 ram
-nvidia geforce 940mx
-1tb toshiba hard drive