i searched a couple of techie sites but i didn't find anything about bad displays, or it locking up.
make sure it didn't get wet, and the batteries are charged and the battery contacts clean.
Try this.
ok, the only thing i found is a problem reading the memory card causing lock ups. but that wouldn't explain the display.
i would put it in a sealed plastic bag with uncooked rice for a few days to try to remove any moisture.
I was actually thinking the same thing....that a memory card problem could cause a lockup. If you have a different memory card, try that. Otherwise, get all your stuff off of it and try formatting it.
Formatting it?