Ps3 suddenly won't connect to Internet

Hey guys, I have my ps3 for almost two years and have been normally playing via psn since then. Suddenly, a few days ago, something happened to my router or ps3- it won't obtain router's ip adress. Whenever I try an Internet connection test, it tries to obtain the ip adress, only to tell me a moment later that the attempt to obtain the ip adress timed out and won't go any further than that. I've tried power cycling both devices several times, with no significant change. I didn't have any power outage that could have caused physical damage to any device. I've also tried connecting to router via an Ethernet cable, but without success. Wifi is working fine for pc, as I'm using it at the moment to write this. Any feedback is appreciated.
Trunta