I have big problem with my Lenovo Y50-70. Yesterday I changed thermall paste and after this temperatures went correctrly down but... I realized that when my laptop is plugged the WIFI connection is very bad. It sees avaible networks but I can't connect or the connection is slow or it is connected and show yellow exclamation mark with "unidentified network". When I unplug it and it works on battery the internet connection is a lot better, it is stable and I can normally use it like before. I saw that when I come closer to the router with plugged laptop it works better but still it isn't best performance. When I unplug - exact in the same second internet start to go faster and when I plug - exact in the same second internet goes slowly.
The performance in games is still better when plugged, only WIFI works badly. In power options there is high performance mode in both and the network card is in high performance mode too.
First time in my life I see something like this. Please help me.