Solved WIFI works better when using battery than plugged [Y50-70]

August 29, 2017 at 04:07:12
Specs: Windows 10
Hello,
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.

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#1
August 29, 2017 at 06:53:38
✔ Best Answer
When you had the laptop apart and reassembled it you may have routed the Wifi antenna differently and it may be running close to the power jack or charging circuit or possibly pinched under a component or screw. I would open and recheck the antenna wire routing and connection. Note that the AC power is giving off a magnetic field that is causing the interference into the antenna wire.

You have to be a little bit crazy to keep you from going insane.

message edited by Fingers


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#2
August 29, 2017 at 08:39:39
Also make sure any shielding in there is correctly placed and grounded. This includes shielding plates as well as conductive strips that surround components and ground to the chassis.

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#3
August 30, 2017 at 01:37:31
Thanks guys for helping me! I resolved it accidently by moving wires before you reply, but now I know what caused the problem. One of antenna wire was going near power supply to fan and I think it could made this problem. Anyway thanks a lot! :)

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#4
August 31, 2017 at 18:05:55
You are quite welcome. Thanks for letting us know.

You have to be a little bit crazy to keep you from going insane.


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