What is wrong / connection with my wi-fi on my lenovo Y550P notebook?

Have you properly configured the router and activated the wireless side of it? Have you set up the same wireless security configuration on the laptop and the router?

Hmm.. I think i’ve propery configured the router as it works for other notebooks that I have right now, however when I turned on the lenovo wi-fi, the router starts to have problem,keep turning on and off frequently

Wireless security configuration? how does that work?

The best way to understand this is to read the.pdf file on the disk that came with the router or check the Linksys (Cisco) website for a copy of that file. There are too many details for me to explain here. Sorry.

I had the same issue with my ideapad y550. It ended up being an issue with reconfiguring my router and making sure that the security setting of my network adapter matched that of the router.

@nicky you said that you made sure that the security setting of your network adapter matched that of the router

how did you do that? I need to learn those steps

Well, there are a few security settings your router can use, WEP, WPA WPA2 etc. So if ur router is set as WPA with whatever password and the settings for your laptop network adapter for that particular connection are WEP, then it wont connect. So you need view the settings that your computer has set for the connection and make sure they match those of the router