By "everything" you mean... everything? Like, reformatting the console?
I'll try it later on my dad's TV. But I'm afraid I may have burnt something on the PS3 by not turning it off before removing the HDMI cable from the TV and plugging it again.
No it doesn't reformat, just changes resets the HDMI resolution. I have to do it with my PS3 every once in awhile still for some reason, don't really know why. Should work though if I believe you are experiencing the same thing.