Can you access the router web interface from your PC?
If automatic IP assign does not work, try manual IP. Sometimes it may works.
Or change the wifi channel, 802.11 mode set to auto(aka b/g/n mixed).

Here are problem i've encountered and solve, that might give you some clues
My HTPC's wifi adapter wont work if i force my Asus/TPlink router to N mode only.
And my Sis's note 3 can't detect my Huawei's modem wifi except i force my router wifi channel to 6.