Help! Panasonic GX1 diagnosed water damage

hi everyone! i would like to ask some guidance... I posted before here that my GX1 has no power.

it was left in it's panasonic case that I bought and haven't really use it a lot back then. I only got the chance to send it for repair weeks ago since we had family emergency. They just called me and told me that the unit is beyond repair due to water damage. I would like to know what are the possible cause of this because as far as I know my camera was never been next to any water that could cause damage. if anyone can enlighten me on what   my options to go from  here cause before I spend for a replacement. TIA