Thanks to the findings of nicholasfromconfolens we know that the problem resides in some parts of the screen getting loose for any reason (factory problem, heat, whatever) and if you apply pressure at certain point the flickering/dimming/darking disappears.

Primary occurring on the left side (becoming darker or with less brightness than the other side) and on Late 2009 27' iMacs but there are cases of the same problem on later computers too.Ĭheck/Read all of these posts to know if your case is the same: This guide is only to resolve flickering and dimming problems on you iMac screen. You need no tools and the cost os this procedure is 0.įirst Step: Be sure that you are experiencing the same symptoms

If you have a Late 2009 27' iMac and are having problems with those annoying problems of flickering and parts of your screen are becoming darker (On the left side primary) you may want to consider this easy guide to fix it if you run out of warranty, have no Apple Care and Apple wanted to charge you about $600 to replace your screen.

Imac 27 late 2013 screen replacement