PS3 won't obtain IP address, times out

With seemingly no problems beforehand, my PS3 has decided to start being annoying and now won't connect to the Internet. I have run every test with different alterations on the Internet Connection Settings section, turned the router off, unplugged the Playstation; everything that all other forums have told me to do, and nothing has worked. Manual, automatic, nothing changes and it times out everytime I try to test the connection. Extremely frustrating. Someone please help.