I downgraded a friend's TA-082 PSP from 2.80 a while back, and it's been fine from then. However, recently when he went to Canada, I think he was running the browser (I'll check up on that part for sure later), and the browser randomly crashed. He wasn't able to turn on the PSP for a bit, and took out the battery and put it back in to start it. Now he says the network icon doesn't show up and he can't use the browser.
What could make this happen? I have yet to take a look at it myself, but I was wondering if anybody else has had experience similar to this.