I too have a similar situation here. I went out to photograph a river this morning after the rain had stopped. It was cold and damp, leaves and trees were wet. After about a half hour I noticed my LCD screen was fogging up within a few minutes the whole screen was gone. I shut off the camera for a few minutes and put it back in the camera bag. When I took it back out it had mostly cleared.
Now its been about three hours, there is a slight fog on one side and across the bottom, maybe a 1/8-1/4 inch width. The screen turns colors after being on a few minutes and kinda vibrates a little. I’ve taken out the battery and removed the front cap and opened all the little doors hoping to air it out.
Is it a lost cause, is it ruined and need a new screen or will it fix itself over a few days? If not will the warranty cover this? If not, any idea on the cost to replace the screen? I live in a rural area of Utah, closest shop is over 200 miles so I am hoping to fix this some how with out making that drive. Its a Sony a300 (my brother’s). Also, any tips on how to avoid this in the future? I really don’t want to wait until spring to use my camera again. Thanks for any help.