mini dell laptop wont connect to the internet

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http://askubuntu.com – I am trying to repair my mini dell- it used to go online just fine, then after a power surge, it quit working. After months of reading and testing, I was able to at least get it to not say in " off line mode" Now when I try to connect, it says "page load error, address not found" Im trying to go online using a wi fi connection. under my connection properties, it says Name: lo Status, Idle Activity rec'd 10972 packets 725.7 kb sent 10972 packets under the support tab it says the internet protocol address is and the subnet mask is the network device is local loopback addre (HowTos)