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Intel iMac 27″ developing dirty, dark spots and patches on the screen : The zombie problem that just won’t die!

March 15, 2011 46 comments

Like one of those nightmare zombies that never stays dead, the dreaded screen dirty dark patch screen problem has recurred….

Started with this:

My Intel ‘Aluminium’ iMac 24″ roasting with dark spots on screen

Admittedly, it did come  back from repairs in record time.

But that was only the beginning, Since this battle for a replacment continued for over a year!!

Then, my new iMac 27″ started to develop dark patches on the screen too.

FFS Apple, fix it.. I just had a new screen for my replacement iMac  in November!

I’m running it in a cool, clean dry environment.

As usual, the discolouration appears to be behind the glass. Or even behind the pixels themselves, in the underlying lighting panel. So there’s no way it could be dirt from regular use.

This time, the discolouration looks somewhat like hand prints…

Or, forget trying to describe it. Let me show you some pics…

Photos taken with an old D70, so vignetting and sensor dirt is a little bit of a problem.

Please note, that these marks only appeared last week so I’ve upped the contrast of the pictures. But I can assure you that within a month they will be quite visible without tweakage.

Ignore the yellow piss-like tinge at the bottom of the screen, although it’s there, it’s hardly noticeable at honest contrasts.

Here is a closeup of the left hand side. Note that I had to intentionally blur the picture when taking it since the moire effect of the pixels made the final image unviewable. What a mess of dots and a fine patina of blobs! Yuck!

Now for the right hand side:

This looks a little bit like the heel of someone’s hand, perhaps…?!?

What more can I add?… This is my second iMac 27″ screen and my 7th (or 8th) iMac screen in total. Grrrr Arrgh! As the phrase goes.

Apple’s quality control has not improved over the last three years.

I’ll keep you posted.