My thunderbolt screen is locked. It shows the right time but has a white triangle indicator with a white exclamation point. I did get it wet but it was not even enough to trip the indicator on the battery. I went to the Verizon store and they looked at it and set up a claim and They have sent a replacement, but I am afraid they are going to tell me it got too wet and charge me full price. Is there anyway to check for water damage ( other than battery) that I check for before sending the original one back? Help any advise?