liquidoblivion

My 2010 TSX tech package received some water damage and now I can't get the audio to display on the GPS screen and it won't ever switch to the backup camera, also the USB port seems to do nothing. Everything else works fine, gps, cd changer, steering wheel controls, aux port, etc. One really annoying thing is the clock won't set itself to the GPS so my clock is off, you can check the time on the GPS system and its correct, it just won't update the dash clock. I have located a wrecked TSX w/ the tech package that I can acquire parts from. If someone could just steer me in the right direction on how to get into this thing and what is most likely my problem that would be awesome. Thanks!