Greyish Smudge marks behind the glass screen.

Well, if it helps any, my monitor actually started looking better after I installed the fan-control app and before I took it in for repair. I had streaks going up the right side of the screen that disappeared after a short while. I'm glad I photographed the problem when it was bad and printed up the photos beforee I went to the Genius Bar. Maybe yours will start looking a bit better.

Hmmmm... thanks that sounds promising...

Which is that fan controlling soft???

I also noticed that when the mac is cool that the problems disappear and as it gets warmer it gets stronger.

Probably it is still some LCD problem but if that helps....???

I also took out the DVD drive from behind the LCD (where the problem is) and put an SSD in the place that also could be problematic.

Thanks

rockjano

Temperature Gauge Pro. It cost me $10 US.

Yeah thanks I just found it..

Looks a bit complex but I will try it...

Thanks for the suggestion...

rockjano

I set it to manual control and keep the fans running just a little faster than normal at all times. The increase in noise is minimal. Then I up the fan speeds even more when needed. I don't use their automatic setting. Maximum fan speed is just overkill and way too noisy.

Thanks a lot

I will try and write back

Thanks

Hope it helps. It's frustrating knowing that Apple was aware of the problem yet still sold model as-is without at least programming the fan speeds faster to reduce some of the heat.

As the grim reaper of the community I would like to say this discussion has surpassed any that I can recall the iMac issue is based on your LCD type point blank period there's not a reliable workout around other than replacement relying on a program install fix will not work despite and yes it is a temperature issue the SAMSUNG LCD circa aren't effect quite like the LG LCD circa regardless it was a mixture of a bad build and a company that even though I know I'm in a room full of die hard Macintosh users as I am included I'm sure clearly knows and knew of this issue at hand but had to push the envelope probably around its discovery with this being said I would sale your machine even though I know this sound outrageous as I did because you'll continue to encounter this problem

Not to mention in my case the heat problem will also eventually over power your BT Module as well as other internal components but if this isn't what you want to hear or can't visual doing such as continue to discuss this problem and I'll bet 10/1 this will continue until infinity and beyond

P.S. MERRY XMAS TO EVERYONE ABOUT THE COMMUNITY SO LONG until next time

Makes me mad!!!!

Otherwise it is such a great machine. Especially that I replaced the otherwise very inreliable DVD drive with SSD, it is like a new computer. It is just soooo much fast than before. Even when I open file from the old HDD it is a LOT faster.

All the DVD drives die sooner or later I think they are just not designed to work in vertical position. (no other computer uses DVD in vertical position)

I use an LG BluRay writer for 3 years and it is just great (faster-better)

rockjano

Wow before I could finish my post I check my email to see that Bilbao 58 is quite familiar of which I speak brilliant

This post was a bit difficult to understand but still Merry Xmas to everyone... :-)

Haha I think so much I believe my brain has created its own OS but hey it's hard being an evil genius @ the Genius Bar needs to display a liquor license cause they seem to be always be intoxicated full of misguiding,and unreliable advice. I have a secret / come closer, closer, closer always call corporate directly to discuss your problem for apple care for whatever reason in store personal really aren't geniuses but actually college kids working for the summer / then he died end if movie roll the credits

I don't know what poison do you take but I want some :-)))))

I'll email you a cup haha

Well i tried it 3 days trial period... well it did not change a lot. The shape of the smudge might changed a little :-)

It only helps if i really turn on the fans which is noisy and probably the fans will die sooner as well so it does not really worth it...