Lenovo IdeaPad 100-14IBY ram not working

Hi all,

I have a Lenovo 100-14iby which supports up to 8GB ram. Currently it is working on 2GB. I bought a new ram stick with 8GB (I only have one slot). I have now M471B5674QH0-YK0 and upgraded with KVR16LS11/8.

From what I can see they have all the same specs expect for the memory size, but why won't the 8GB work on the laptop? When I start the laptop I only see a black screen. When I put back the 2GB ram, it works well.

Hope someone could help me. Thanks!