[Juanca_ab]

I have a 2 GHz Intel Core Duo 20" iMac. I'm having a problem lately with the screen, some "stains" are starting to appear inside the screen. Here you can see some pictures I just took so that you can see, the problem is in the upper and on the left side of the screen: http://img118.images...antalla1zg9.jpg, http://img130.images...antalla2yq3.jpg, http://img459.images...antalla3xd3.jpg, http://img253.images...antalla4xj3.jpg
And the problem is getting worse and worse... does anybody have a clue why this is happening?

[RogueCrew]

That looks like severe condensation to me, but the pictures don't show it clearly in every shot. I'm guessing it's very humid where you live. Moisture in the air gets trapped inside the Mac, and when the room it's in cools off (perhaps at night?), then the moisture condenses into water and runs down the inside of your screen. If this is the case, then the electrical circuits are in great danger also. You're Mac could just stop working one day, if there's an internal electrical short.
You need to find a way to keep your Mac in a more controlled environment, without big humidity or temperature swings.

[Mycroft_Holmes_MW]

Duplicate post:
http://www.macworld....3&Number=497137