Mist behind screen

Question

Hi there,
BIG probs! There is a layer of mist / moisture on the other side of my iMac 2011 screen. It hasn't covered the whole screen but enough to be eaily noticeable since that area is very blurred.
Has this happened to anyone else or is it because Hong Kong is too humid and not suitable for imac screens?
Any idea how to clean it off without opening up the iMac or do I have to take it in for repairs?
Cheers
L

Answer 1

Perhaps to know the relative humidity and temperature, so as to note
the indoor 'dew-point', where condensation forms inside the iMac,
may be a good thing; to use basic weather instruments that sit on a
desk or hang on a wall, could give you that much at little cost...
Then see if you can adjust these, practically, to suit the iMac.
To better identify the iMac precisely first, then look into a guide, an
idea of the glass panel & other internals, can be read about here:
•Intel-based iMac computer guides:
http://www.ifixit.com/Device/iMac_Intel
You state the iMac is a 2011 model, and according to iFixit.com guides
where they show two 'mid-2011' units, a 21.5-inch & 27-inch; if that
is the correct/exact model series, both have a glass panel in front of the
LCD, and it is removable. Identifying the computer model precisely helps.
IF your computer is a 27-inch, Mid-2011 EMC 2429 iMac, the guide would be:
http://www.ifixit.com/Guide/iMac+Intel+27-Inch+EMC+2429+Display+Replacement/7551
A 21.5-inch, Mid-2011 EMC 2428  iMac, the guide would be this one:
http://www.ifixit.com/Device/iMac_Intel_21.5%22_EMC_2428
These both show a process to take the glass panel that covers the LCD, off.
Later models have no separate protective glass panel, so would not be able
to be cleaned or disassembled in the way indicated by earlier methods.
And these are not designed for a home-user to do much in the way of service
or upgrade; the 21.5-inch model usually is more limited to upgrade than a 27"
{in that RAM is not user-upgradable; so one has a certified tech do that, too.}
I hope you can get adequate use of the iMac, without incident of humidity or
condensation issues. You could likely use the Apple Support page where you
can enter your product serial number into their page, to see which one it is.
Their records are a fair place to look, especially as a first-owner. For older and
pre-owned units, there are online 'identify by serial number or model' web sites.
Good luck & happy computing!