i just did that mod an hour ago
it scared the crap out of me
the same thing happened to me
but i took mine apart to solder it like the link at eatmorepork showed, i did it right on the circuit board. not through some hole like i hear everone talking about. afterwards mine wouldn't come on so i went back in and cleaned up the solder a bit and now it works. first it reset to LA california and said my dvd was bad.
luckily i had another laying around and that worked fine. I drove around the block and tested it and it works just like it used to before the upgrade and the hack(i can now driv