My room mate fell in the living room...and stepped on my PS3 controller...and knocked my PS3 over...
The PS3 seemed fine but when I went to run Blast Factor when it said "Internet Connection Unavaible: Press O to return" Nothing functioned. Tried the PS button. Menu loads, neither X nor (Tri.) worked. This proved true everywhere else in the console, so I "Restore Default Settings"
BAM everthing worked fine again.
Too bad I don't know why, but its pretty powerful, and didn't destroy any of my data Thanks Sony for creating a system that can heal itself