I have a new Humminbird 175, which was left on the boat during a weekend of heavy rains.  Somehow the unit seems to have absorbed moistgure.  The screen is hazy and the unit won't work.  Any suggestions as to how I could dry it out?  I have contacted the factory, but have heard nothing as yet.  Thanks for your thoughts,

 

G8RBob

If you crack open the case, that may void the warranty.  Best bet is to let the factory tell you what they will do to help.  If it's a new unit and still in warranty, H'bird should replace it.

If the moisture is on the inside of the screen just send it in for a replacement. If it's out of warranty, throw it in a bag of rice and completely cover the unit for a day or 2 to absorb the moisture. it won't hurt the unit at all.  

I have had in the past had this happen years ago, I put mine in my gun safe that has a dehumidifier, the following weekend it worked as good as ever. What iabass said sounds like another good option, it should survive, but if under warranty I would send it back to hummingbird, even the cheap 180 I have on the Metalmissfitt has never got moisture in it and it sets out all the time, they should be water tight unless the seals are bad, and Humminbird will fix it if it is under warranty without a charge.