I owned the previous gen Y520 and it have heck more problem i ever expected
first the screw use, unscrew to replace the ram but few month down the road, many screw were missing, i'm really sure i tighten them , i replace them with new set of screw and
few month later same thing happen, few screw is missing search online and its a common problem with lenovo

then the worst ever thing happen, one of the hinge start to spoil , when opening/closing make a loud noise call lenovo come n fixed it, they come with wrong part and come second time

next thing happen , keyboard issue, the keyboard will not register few word, solution : untight few screw    sound WTF but it did solve the issue

the current newest issue, the casing for the screen is loose on one side    and its not repairable as a clips broken  

if you ask me , i would say stay away from lenovo for sometime 

yup , it will goes loose n i have to inspect it monthly to tighten up all

thats y need to screw every month, later problem again

nope, when they come to warranty my screen hinge, they open up the whole pc and tight it back , guess what, the screw still drop every now and then 

well their service center location can be best say hard to reach since my door steps warranty expired

my bad , 2 year onsite