Weak chest. While the new Intel processors represent the largest performance boost in years, the Lenovo Yoga 520-14IKB is still equipped with older Kaby Lake processors. You can find out in this extensive test, why the convertible did not receive our final recommendation.
https://www.notebookcheck.net/Lenovo-Yoga-520-14IKB-i5-7200U-256-GB-SSD-Laptop-Review.268080.0.html
There's a factory issue that affects every other Yoga 520, a hardware problem. As a result the screen starts flickering heavily at random instances, sometimes it goes completely black. Customer support explained the issue to me (a well-known problem), then asked for about 370 euro to get it fixed. Within 3 months of purchase!! Thanks Lenovo for selling me a broken laptop.
I Do have the same problem , have you found any solution ?